feat: 性能优化 + 设备总览轨迹展示 + 广播指令API

性能: SQLite WAL模式、aiohttp Session复用、TCP连接锁+空闲超时、
device_id缓存、WebSocket并发广播、API Key认证缓存、围栏N+1查询
批量化、逆地理编码并行化、新增5个DB索引、日志降级DEBUG

功能: 广播指令API(broadcast)、exclude_type低精度后端过滤、
前端设备总览Tab+多设备轨迹叠加+高亮联动+搜索+专属颜色

via [HAPI](https://hapi.run)

Co-Authored-By: HAPI <noreply@hapi.run>

app/services/fence_checker.py

@@ -234,6 +234,19 @@ async def check_device_fences(
         "cell_id": cell_id,
     }
 
+    # 2. Batch-load all fence states in one query (avoid N+1)
+    fence_ids = [f.id for f in fences]
+    states_result = await session.execute(
+        select(DeviceFenceState).where(
+            DeviceFenceState.device_id == device_id,
+            DeviceFenceState.fence_id.in_(fence_ids),
+        )
+    )
+    states_map: dict[int, DeviceFenceState] = {s.fence_id: s for s in states_result.scalars().all()}
+
+    # Pre-check today's attendance dedup once (not per-fence)
+    _today_clock_in = await _has_attendance_today(session, device_id, "clock_in")
+
     tolerance = _get_tolerance_for_location_type(location_type)
     events: list[dict] = []
     now = now_cst()
@@ -242,14 +255,7 @@ async def check_device_fences(
     for fence in fences:
         currently_inside = is_inside_fence(latitude, longitude, fence, tolerance)
 
-        # 2. Get or create state record
-        state_result = await session.execute(
-            select(DeviceFenceState).where(
-                DeviceFenceState.device_id == device_id,
-                DeviceFenceState.fence_id == fence.id,
-            )
-        )
-        state = state_result.scalar_one_or_none()
+        state = states_map.get(fence.id)
 
         was_inside = bool(state and state.is_inside)
 
@@ -266,8 +272,8 @@ async def check_device_fences(
                     _update_state(state, currently_inside, now, latitude, longitude)
                     continue
 
-            # Daily dedup: only one clock_in per device per day
-            if await _has_attendance_today(session, device_id, "clock_in"):
+            # Daily dedup: only one clock_in per device per day (pre-fetched)
+            if _today_clock_in:
                 logger.info(
                     "Fence skip clock_in: device=%d fence=%d(%s) already clocked in today",
                     device_id, fence.id, fence.name,