feat(gotify): Phase 4 C1 — WebSocket reconnect + 帧解析

- src/gotify/reconnect.rs: ReconnectPolicy 按 §15 退避序列
  1s/2s/4s/8s/16s/30s...record_success() 重置；inline #[cfg(test)]
  3 个 backoff 测试
- src/gotify/websocket.rs: blocking tungstenite 0.21 客户端
  · stream_url() http→ws / https→wss 自动转
  · build_request() 手拼 Sec-WebSocket-* header + Authorization: Bearer
  · connect_once() 单次 handshake
  · run_stream_loop() 永久循环：connect → read Message::Text 解析
    GotifyMessage → 回调 on_message；Ping 触发 Pong；Close/断开/读
    错都走到 §15 退避后重连
- src/gotify/mod.rs: re-export 加 reconnect + websocket 子模块
- Cargo.toml: tungstenite 0.21 (rustls-tls-webpki-roots + handshake
  feature) + http 1 + url 2
- tests/gotify_websocket.rs: 3 个 JSON envelope 解析测试

避坑：
- tungstenite 0.21 的 connect 在 handshake feature 后（默认不带），要
  显式开
- WebSocketConfig 0.21 没 connect_timeout 字段；靠 rustls 默认 ~30s
  上限（Phase 4 LAN 部署可接受；Phase 8 再补 socket-level timeout）
- read_message() 在 0.21 已 deprecated；改用 read()
- Message 枚举加覆盖 Pong / Frame 两支（compiler non-exhaustive 警告）
- inline #[cfg(test)] mod tests 在 reconnect.rs 跑 unit tests（与
  tests/ 集成测试并列）

验证：cargo build / build --release 都 exit 0，0 warning
- cargo test: 12 passed (3 reconnect unit + 6 api + 3 websocket); 0 failed
- debug   33.36 MB, subsystem = WINDOWS_CUI
- release  9.43 MB, subsystem = WINDOWS_GUI（tungstenite + http 在 LTO
  后几乎不增体积——和 Phase 3 C2 持平）

Cargo.lock

@@ -508,6 +508,15 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "block2"
 version = "0.5.1"
@@ -581,6 +590,12 @@ dependencies = [
  "syn 3.0.6",
 ]
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "byteorder-lite"
 version = "0.1.0"
@@ -681,8 +696,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "65c35e4b699c7e15ccbe7ee35c005e4fc0a278d22238a2857e6ce2dadeda1b06"
 dependencies = [
  "cfg-if",
- "cpufeatures",
- "rand_core",
+ "cpufeatures 0.3.1",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -838,6 +853,15 @@ version = "3.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7704b5fdd17b18ae31c4c1da5a2e0305a2bf17b5249300a9ee9ed7b72114c636"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "cpufeatures"
 version = "0.3.1"
@@ -902,6 +926,16 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
 
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "ctor"
 version = "0.10.1"
@@ -917,6 +951,12 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f27ae1dd37df86211c42e150270f82743308803d90a6f6e6651cd730d5e1732f"
 
+[[package]]
+name = "data-encoding"
+version = "2.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4583a4551df46e2792f82ceeac45e850d2e2d5debba0b91f102385cda5b11f06"
+
 [[package]]
 name = "data-url"
 version = "0.3.2"
@@ -946,6 +986,16 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "dispatch"
 version = "0.2.0"
@@ -1447,6 +1497,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "gethostname"
 version = "1.1.0"
@@ -1492,7 +1552,7 @@ dependencies = [
  "js-sys",
  "libc",
  "r-efi 6.0.0",
- "rand_core",
+ "rand_core 0.10.1",
  "wasm-bindgen",
 ]
 
@@ -1778,11 +1838,11 @@ dependencies = [
  "http",
  "hyper",
  "hyper-util",
- "rustls",
+ "rustls 0.23.45",
  "tokio",
  "tokio-rustls",
  "tower-service",
- "webpki-roots",
+ "webpki-roots 1.0.9",
 ]
 
 [[package]]
@@ -3607,6 +3667,15 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9"
+dependencies = [
+ "zerocopy",
+]
+
 [[package]]
 name = "presser"
 version = "0.3.1"
@@ -3691,7 +3760,7 @@ dependencies = [
  "quinn-proto",
  "quinn-udp",
  "rustc-hash 2.1.3",
- "rustls",
+ "rustls 0.23.45",
  "socket2",
  "thiserror 2.0.20",
  "tokio",
@@ -3708,11 +3777,11 @@ dependencies = [
  "bytes",
  "getrandom 0.4.3",
  "lru-slab",
- "rand",
+ "rand 0.10.2",
  "rand_pcg",
  "ring",
  "rustc-hash 2.1.3",
- "rustls",
+ "rustls 0.23.45",
  "rustls-pki-types",
  "slab",
  "thiserror 2.0.20",
@@ -3756,6 +3825,17 @@ version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
+[[package]]
+name = "rand"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e058c7de0b26af77780c769414d6257830bb240f3c38477dbc2c16e5f54d6d4c"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "rand"
 version = "0.10.2"
@@ -3764,7 +3844,26 @@ checksum = "c7f5fa3a058cd35567ef9bfa5e75732bee0f9e4c55fa90477bef2dfcdbc4be80"
 dependencies = [
  "chacha20",
  "getrandom 0.4.3",
- "rand_core",
+ "rand_core 0.10.1",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom 0.2.17",
 ]
 
 [[package]]
@@ -3779,7 +3878,7 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "caa0f4137e1c0a72f4c651489402276c8e8e1cf081f3b0ba156d2cbeef09e86a"
 dependencies = [
- "rand_core",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -3921,7 +4020,7 @@ dependencies = [
  "percent-encoding",
  "pin-project-lite",
  "quinn",
- "rustls",
+ "rustls 0.23.45",
  "rustls-pki-types",
  "serde",
  "serde_json",
@@ -3936,7 +4035,7 @@ dependencies = [
  "wasm-bindgen",
  "wasm-bindgen-futures",
  "web-sys",
- "webpki-roots",
+ "webpki-roots 1.0.9",
 ]
 
 [[package]]
@@ -4062,6 +4161,20 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.22.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf4ef73721ac7bcd79b2b315da7779d8fc09718c6b3d2d1b2d94850eb8c18432"
+dependencies = [
+ "log",
+ "ring",
+ "rustls-pki-types",
+ "rustls-webpki 0.102.8",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "rustls"
 version = "0.23.45"
@@ -4071,7 +4184,7 @@ dependencies = [
  "once_cell",
  "ring",
  "rustls-pki-types",
- "rustls-webpki",
+ "rustls-webpki 0.103.15",
  "subtle",
  "zeroize",
 ]
@@ -4086,6 +4199,17 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "rustls-webpki"
+version = "0.102.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64ca1bc8749bd4cf37b5ce386cc146580777b4e8572c7b97baf22c83f444bee9"
+dependencies = [
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
+]
+
 [[package]]
 name = "rustls-webpki"
 version = "0.103.15"
@@ -4230,6 +4354,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sha1"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a978451301f4db1d02937a4ab3ccce137717b81826e79b7d49ffe3244a13c3b8"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.2.17",
+ "digest",
+]
+
 [[package]]
 name = "sharded-slab"
 version = "0.1.7"
@@ -4852,7 +4987,7 @@ version = "0.26.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b0c85f2c3ef0b1cd58b36682f4b17aaa995f0e5db534d85692b4903abce21f67"
 dependencies = [
- "rustls",
+ "rustls 0.23.45",
  "tokio",
 ]
 
@@ -5038,6 +5173,28 @@ version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2df906b07856748fa3f6e0ad0cbaa047052d4a7dd609e231c4f72cee8c36f31"
 
+[[package]]
+name = "tungstenite"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ef1a641ea34f399a848dea702823bbecfb4c486f911735368f1f137cb8257e1"
+dependencies = [
+ "byteorder",
+ "bytes",
+ "data-encoding",
+ "http",
+ "httparse",
+ "log",
+ "rand 0.8.8",
+ "rustls 0.22.4",
+ "rustls-pki-types",
+ "sha1",
+ "thiserror 1.0.69",
+ "url",
+ "utf-8",
+ "webpki-roots 0.26.11",
+]
+
 [[package]]
 name = "typed-index-collections"
 version = "3.5.0"
@@ -5048,6 +5205,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "typenum"
+version = "1.20.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6f5e870be6c3b371b77fe0ee0bafb859fa4964b4404c27de1d380043c4dda20"
+
 [[package]]
 name = "udev"
 version = "0.9.3"
@@ -5177,6 +5340,12 @@ dependencies = [
  "xmlwriter",
 ]
 
+[[package]]
+name = "utf-8"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
+
 [[package]]
 name = "utf8_iter"
 version = "1.0.4"
@@ -5463,6 +5632,15 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "webpki-roots"
+version = "0.26.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "521bc38abb08001b01866da9f51eb7c5d647a19260e00054a8c7fd5f9e57f7a9"
+dependencies = [
+ "webpki-roots 1.0.9",
+]
+
 [[package]]
 name = "webpki-roots"
 version = "1.0.9"
@@ -5683,6 +5861,7 @@ name = "windows-gotify-client-rust"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "http",
  "reqwest",
  "serde",
  "serde_json",
@@ -5691,6 +5870,8 @@ dependencies = [
  "thiserror 2.0.20",
  "tracing",
  "tracing-subscriber",
+ "tungstenite",
+ "url",
 ]
 
 [[package]]