refactor: 调度器迁移至独立模块，消除 services->api 反向依赖

- 将调度器相关模块从 src/services/cache/ 迁移到 src/services/scheduling/
- 下沉类型定义到 core 层: AccessRestrictions, ProviderAuthInfo, ParsedChunk/StreamStats, 视频工具函数
- 提取 thinking_cache 签名缓存到 core/api_format/conversion/
- 提取 provider 认证逻辑到 services/provider/auth
- 提取遥测记录到 services/usage/telemetry
- 提取 models 列表缓存到 services/cache/model_list_cache
- 更新所有引用方的 import 路径及相关测试

src/api/admin/monitoring/cache.py

@@ -22,8 +22,8 @@ from src.core.crypto import crypto_service
 from src.core.logger import logger
 from src.database import get_db
 from src.models.database import ApiKey, User
-from src.services.cache.affinity_manager import get_affinity_manager
-from src.services.cache.aware_scheduler import CacheAwareScheduler, get_cache_aware_scheduler
+from src.services.scheduling.affinity_manager import get_affinity_manager
+from src.services.scheduling.aware_scheduler import CacheAwareScheduler, get_cache_aware_scheduler
 from src.services.system.config import SystemConfigService
 
 router = APIRouter(prefix="/api/admin/monitoring/cache", tags=["Admin - Monitoring: Cache"])
@@ -1103,8 +1103,8 @@ class AdminClearProviderCacheAdapter(AdminApiAdapter):
 class AdminCacheConfigAdapter(AdminApiAdapter):
     async def handle(self, context: ApiRequestContext) -> dict[str, Any]:  # type: ignore[override]
         from src.config.constants import ConcurrencyDefaults
-        from src.services.cache.affinity_manager import CacheAffinityManager
         from src.services.rate_limit.adaptive_reservation import get_adaptive_reservation_manager
+        from src.services.scheduling.affinity_manager import CacheAffinityManager
 
         # 获取动态预留管理器的配置
         reservation_manager = get_adaptive_reservation_manager()