Merge remote-tracking branch 'origin/master' into codex/pr57-p0-p2

# Conflicts:
#	docs/【玩法创作】平台入口与玩法链路-2026-05-15.md
#	docs/【项目基线】当前产品与工程约束-2026-05-15.md

server-rs/crates/api-server/src/modules/health.rs

@@ -1,7 +1,12 @@
 use axum::{Router, routing::get};
 
-use crate::{health::health_check, state::AppState};
+use crate::{
+    health::{health_check, readiness_check},
+    state::AppState,
+};
 
 pub fn router(_state: AppState) -> Router<AppState> {
-    Router::new().route("/healthz", get(health_check))
+    Router::new()
+        .route("/healthz", get(health_check))
+        .route("/readyz", get(readiness_check))
 }