feat(pool,scheduling): 号池调度维度、配额冷却机制与管理后台重构

- 新增 scheduling_dimensions 模块，为每个 Key 计算多维调度状态(手动/冷却/熔断/成本/健康)
- 新增 quota_cooldown 模块，统一判定 Key 的有效冷却原因
- Pool 管理后台 API 扩展 Key 详情字段(调度状态/维度/配额/OAuth 信息)
- 前端 Pool 管理页面重写，支持调度状态展示、批量清理封禁 Key
- Handler 基类增加请求调度元数据采集，stream telemetry 增强
- 请求时间线组件增强，支持 attempted 候选展示
- Kiro OAuth 凭证导入解析改进
- 新增 usage 表 provider_key 索引迁移
- 补充调度维度、配额冷却、候选枚举等单元测试

Closes #197

Co-authored-by: AAEE86 <33052466+AAEE86@users.noreply.github.com>

src/services/task/service.py

@@ -119,6 +119,7 @@ class TaskService:
                 allow_format_conversion=allow_format_conversion,
                 capability_requirements=capability_requirements,
                 max_candidates=max_candidates,
+                request_body=request_body,
             )
 
             candidate_keys = []
@@ -598,8 +599,22 @@ class TaskService:
             # Build pool scheduling summary from traces collected during reorder.
             if pool_traces and result.key_id:
                 try:
+                    attempted_key_ids: set[str] = set()
+                    for ck in result.candidate_keys or []:
+                        status = str(getattr(ck, "status", "") or "").strip().lower()
+                        if status in {"", "available", "pending", "skipped", "unused"}:
+                            continue
+                        kid = getattr(ck, "key_id", None)
+                        if isinstance(kid, str) and kid:
+                            attempted_key_ids.add(kid)
+                    if not attempted_key_ids:
+                        attempted_key_ids.add(str(result.key_id))
+
                     for pt in pool_traces:
-                        summary = pt.build_summary(result.key_id)
+                        summary = pt.build_summary(
+                            result.key_id,
+                            attempted_key_ids=attempted_key_ids,
+                        )
                         if summary:
                             result.pool_summary = summary
                             break
@@ -1204,6 +1219,7 @@ class TaskService:
         allow_format_conversion: bool = False,
         capability_requirements: dict[str, bool] | None = None,
         max_candidates: int | None = None,
+        request_body: dict[str, Any] | None = None,
     ) -> Any:
         """
         Unified ASYNC submit entrypoint (Phase 3.2).
@@ -1300,6 +1316,7 @@ class TaskService:
                 request_id=request_id,
                 is_stream=False,
                 capability_requirements=capability_requirements,
+                request_body=request_body,
             )
 
             if not candidates:
@@ -1309,6 +1326,12 @@ class TaskService:
                     last_status_code=None,
                 )
 
+            # Account Pool: keep internal key failover order/skip behavior
+            # consistent with the SYNC path.
+            candidates, _pool_traces = await self._apply_pool_reorder(
+                candidates, request_body=request_body
+            )
+
             if max_candidates is not None and max_candidates > 0:
                 candidates = candidates[:max_candidates]