feat(quota): refactor quota management and rate limiting services

- Add `API_KEY_RATE_LIMIT_EXCEEDED` error code.
- Refactor `QuotaExceededError` to support resource type localization.
- Optimize rate limiting service by implementing the sliding window algorithm.
- Add rate limit validation for tenant plans.
- Unify quota check decorator to support both synchronous and asynchronous operations.
- Enhance quota usage statistics endpoints.

api/app/core/quota_stub.py

@@ -18,6 +18,7 @@ from app.core.quota_manager import (
     get_quota_usage,
     _check_quota,
     QuotaUsageRepository,
+    TENANT_QPS_REDIS_KEY,
 )
 
 __all__ = [
@@ -33,4 +34,5 @@ __all__ = [
     "get_quota_usage",
     "_check_quota",
     "QuotaUsageRepository",
+    "TENANT_QPS_REDIS_KEY",
 ]