feat(gateway): 补齐号池主动探测后台任务 (#342)

- 解析 pool_advanced 主动探测开关与间隔配置
- 对齐 Python 版本的探测间隔默认值和范围限制
- 新增号池配额主动探测 worker
- 支持 codex、kiro、antigravity provider
- 使用 Redis 时间戳和 provider 级锁避免重复探测
- 接入 gateway 后台任务并补充测试

apps/aether-gateway/src/state/core.rs

@@ -40,6 +40,7 @@ use crate::maintenance::spawn_db_maintenance_worker;
 use crate::maintenance::spawn_gemini_file_mapping_cleanup_worker;
 use crate::maintenance::spawn_pending_cleanup_worker;
 use crate::maintenance::spawn_pool_monitor_worker;
+use crate::maintenance::spawn_pool_quota_probe_worker;
 use crate::maintenance::spawn_provider_checkin_worker;
 use crate::maintenance::spawn_proxy_node_stale_cleanup_worker;
 use crate::maintenance::spawn_proxy_upgrade_rollout_worker;
@@ -820,6 +821,9 @@ impl AppState {
         if let Some(handle) = spawn_pool_monitor_worker(self.data.clone()) {
             tasks.push(handle);
         }
+        if let Some(handle) = spawn_pool_quota_probe_worker(self.clone()) {
+            tasks.push(handle);
+        }
         if let Some(handle) = spawn_stats_hourly_aggregation_worker(self.data.clone()) {
             tasks.push(handle);
         }