fix(lint): ruff auto-fix + lewooogo-core src 加入 git

- Python: ruff --fix 修復 280 個 lint 錯誤
- lewooogo-core: src/ 目錄未追蹤，導致 CI eslint 失敗

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/services/host_aggregator.py

@@ -20,7 +20,7 @@ Features:
 import asyncio
 import ssl
 from dataclasses import dataclass, field
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from enum import Enum
 from typing import Literal
 
@@ -94,7 +94,7 @@ class HostStatus:
     status: Literal["healthy", "degraded", "unhealthy", "unreachable"]
     services: list[ServiceStatus]
     metrics: HostMetrics | None = None
-    last_check: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
+    last_check: datetime = field(default_factory=lambda: datetime.now(UTC))
     error: str | None = None
 
 
@@ -222,7 +222,7 @@ async def _tcp_probe(ip: str, port: int, timeout: float = 3.0) -> tuple[bool, fl
         await writer.wait_closed()
         return True, round(latency, 2), None
 
-    except asyncio.TimeoutError:
+    except TimeoutError:
         return False, None, "timeout"
     except ConnectionRefusedError:
         return False, None, "connection refused"
@@ -481,7 +481,7 @@ class HostAggregator:
         )
 
         return AggregatedStatus(
-            timestamp=datetime.now(timezone.utc),
+            timestamp=datetime.now(UTC),
             environment=settings.ENVIRONMENT,
             mock_mode=False,  # Always real mode
             overall_status=overall,