完善外部生成Worker动态扩缩容

新增外部生成controller进程角色与systemd服务

补齐队列统计procedure与spacetime-client绑定

更新生产部署脚本、健康巡检和server provision的worker/controller口径

新增容器worker smoke脚本并同步运维文档与团队记忆

server-rs/crates/spacetime-client/src/mapper/external_generation.rs

@@ -94,6 +94,30 @@ pub(crate) fn map_external_generation_job_claim_result(
         .collect())
 }
 
+pub(crate) fn map_external_generation_queue_stats_result(
+    result: ExternalGenerationQueueStatsProcedureResult,
+) -> Result<ExternalGenerationQueueStatsRecord, SpacetimeClientError> {
+    if !result.ok {
+        return Err(SpacetimeClientError::procedure_failed(result.error_message));
+    }
+
+    let stats = result.stats.ok_or_else(|| {
+        SpacetimeClientError::missing_snapshot("external_generation queue stats 快照")
+    })?;
+
+    Ok(ExternalGenerationQueueStatsRecord {
+        pending_count: stats.pending_count,
+        delayed_pending_count: stats.delayed_pending_count,
+        claimable_pending_count: stats.claimable_pending_count,
+        running_active_count: stats.running_active_count,
+        expired_running_count: stats.expired_running_count,
+        terminal_count: stats.terminal_count,
+        claimable_count: stats.claimable_count,
+        oldest_claimable_age_micros: stats.oldest_claimable_age_micros,
+        now_micros: stats.now_micros,
+    })
+}
+
 fn map_external_generation_job_snapshot(
     snapshot: ExternalGenerationJobSnapshot,
 ) -> ExternalGenerationJobRecord {
@@ -199,3 +223,16 @@ pub struct ExternalGenerationJobRecord {
     pub updated_at: String,
     pub lease_token: Option<String>,
 }
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct ExternalGenerationQueueStatsRecord {
+    pub pending_count: u32,
+    pub delayed_pending_count: u32,
+    pub claimable_pending_count: u32,
+    pub running_active_count: u32,
+    pub expired_running_count: u32,
+    pub terminal_count: u32,
+    pub claimable_count: u32,
+    pub oldest_claimable_age_micros: Option<i64>,
+    pub now_micros: i64,
+}