补充 release SpacetimeDB 健康检查与巡检防回退

增加 SpacetimeDB 阶段化健康检查与 /readyz 阶段输出
记录 procedure/reducer/read 失败的阶段和耗时
补充 release 健康巡检 systemd timer 与生产 ops 预检
同步 API 构建部署、provision 脚本和运维文档

server-rs/crates/api-server/src/state.rs

@@ -31,7 +31,9 @@ use platform_wechat::{WechatClient, WechatConfig, pay::WechatPayClient};
 use serde_json::Value;
 use shared_contracts::creation_entry_config::CreationEntryConfigResponse;
 use shared_contracts::creative_agent::CreativeAgentSessionSnapshot;
-use spacetime_client::{SpacetimeClient, SpacetimeClientConfig, SpacetimeClientError};
+use spacetime_client::{
+    SpacetimeClient, SpacetimeClientConfig, SpacetimeClientError, SpacetimeClientHealthSnapshot,
+};
 use time::OffsetDateTime;
 use tokio::sync::{Semaphore, broadcast};
 use tracing::{info, warn};
@@ -242,6 +244,8 @@ pub struct AppStateInner {
     refresh_cookie_config: RefreshCookieConfig,
     #[cfg(test)]
     test_creation_entry_config: Arc<Mutex<Option<CreationEntryConfigResponse>>>,
+    #[cfg(test)]
+    test_spacetime_health: Arc<Mutex<Option<SpacetimeClientHealthSnapshot>>>,
     oss_client: Option<OssClient>,
     #[cfg_attr(test, allow(dead_code))]
     auth_store: InMemoryAuthStore,
@@ -418,6 +422,10 @@ impl AppState {
             test_creation_entry_config: Arc::new(Mutex::new(Some(
                 crate::creation_entry_config::test_creation_entry_config_response(),
             ))),
+            #[cfg(test)]
+            test_spacetime_health: Arc::new(Mutex::new(Some(
+                SpacetimeClientHealthSnapshot::healthy_for_test(),
+            ))),
             oss_client,
             auth_store,
             password_entry_service,
@@ -467,6 +475,30 @@ impl AppState {
         self.ready.store(false, Ordering::Release);
     }
 
+    pub async fn spacetime_health_check(&self) -> SpacetimeClientHealthSnapshot {
+        #[cfg(test)]
+        if let Some(snapshot) = self
+            .test_spacetime_health
+            .lock()
+            .expect("test spacetime health should lock")
+            .clone()
+        {
+            return snapshot;
+        }
+
+        self.spacetime_client
+            .health_check(self.config.spacetime_health_check_timeout)
+            .await
+    }
+
+    #[cfg(test)]
+    pub(crate) fn set_test_spacetime_health(&self, snapshot: SpacetimeClientHealthSnapshot) {
+        *self
+            .test_spacetime_health
+            .lock()
+            .expect("test spacetime health should lock") = Some(snapshot);
+    }
+
     pub async fn upsert_creation_entry_type_config(
         &self,
         input: module_runtime::CreationEntryTypeAdminUpsertInput,