refactor: 重构 AgentScope ReAct Runner 与事件处理

- 重构 runtime/runner.py 实现 ReAct Agent 核心逻辑
- 更新事件编码器与存储机制
- 优化 prompt 系统与 tool 调用
- 调整 agent service 与 repository 配合

backend/src/v1/auth/gateway.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import asyncio
+import time
 from collections.abc import Mapping
 from typing import Any, cast
 from urllib.parse import urlparse
@@ -32,6 +33,11 @@ AUTH_UNAVAILABLE_DETAIL = "Auth service temporarily unavailable"
 
 
 class SupabaseAuthGateway(AuthServiceGateway):
+    def __init__(self) -> None:
+        self._user_lookup_cache_ttl_seconds: int = 60
+        self._user_lookup_cache_expires_at: float = 0.0
+        self._users_by_email: dict[str, Any] = {}
+
     def _get_client(self) -> Any:
         return supabase_service.get_client()
 
@@ -185,16 +191,22 @@ class SupabaseAuthGateway(AuthServiceGateway):
 
     async def get_user_by_email(self, email: str) -> UserByEmailResponse:
         admin_client = self._get_admin_client()
-        users = await asyncio.to_thread(_list_auth_users, admin_client)
         normalized_email = email.lower()
-        user = next(
-            (
-                candidate
-                for candidate in users
-                if str(getattr(candidate, "email", "")).lower() == normalized_email
-            ),
-            None,
-        )
+
+        now = time.monotonic()
+        if now >= self._user_lookup_cache_expires_at:
+            users = await asyncio.to_thread(_list_auth_users, admin_client)
+            users_by_email: dict[str, Any] = {}
+            for candidate in users:
+                candidate_email = str(getattr(candidate, "email", "")).lower()
+                if candidate_email:
+                    users_by_email[candidate_email] = candidate
+            self._users_by_email = users_by_email
+            self._user_lookup_cache_expires_at = (
+                now + self._user_lookup_cache_ttl_seconds
+            )
+
+        user = self._users_by_email.get(normalized_email)
         if user is None:
             raise HTTPException(status_code=404, detail="User not found")