收口微信领域能力

将 api-server 微信 HTTP/BFF 适配统一迁移到 wechat 目录。

将微信支付和虚拟支付消息协议细节下沉到 platform-wechat。

拆分 platform-wechat 的订阅消息与支付模块并补齐依赖。

修正微信相关测试的用户 ID 夹具并同步后端架构文档。

server-rs/Cargo.lock

@@ -2513,11 +2513,21 @@ dependencies = [
 name = "platform-wechat"
 version = "0.1.0"
 dependencies = [
+ "aes",
+ "base64 0.22.1",
+ "cbc",
+ "hex",
  "reqwest 0.12.28",
+ "ring",
  "serde",
  "serde_json",
+ "sha1",
+ "sha2",
+ "shared-contracts",
+ "time",
  "tracing",
  "url",
+ "urlencoding",
 ]
 
 [[package]]