Add WebSocket, multi API key, geocoding proxy, beacon map picker, and comprehensive bug fixes

- Multi API Key + permission system (read/write/admin) with SHA-256 hash
- WebSocket real-time push (location, alarm, device_status, attendance, bluetooth)
- Geocoding proxy endpoints for Amap POI search and reverse geocode
- Beacon modal map-based location picker with search and click-to-select
- GCJ-02 ↔ WGS-84 bidirectional coordinate conversion
- Data cleanup scheduler (configurable retention days)
- Fix GPS longitude sign inversion (course_status bit 11: 0=East, 1=West)
- Fix 2G CellID 2→3 bytes across all protocols (0x28, 0x2C, parser.py)
- Fix parser loop guards, alarm_source field length, CommandLog.sent_at
- Fix geocoding IMEI parameterization, require_admin import
- Improve API error messages for 422 validation errors
- Remove beacon floor/area fields (consolidated into name)

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

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

app/config.py

@@ -29,20 +29,21 @@ class Settings(BaseSettings):
     RATE_LIMIT_DEFAULT: str = Field(default="60/minute", description="Default rate limit")
     RATE_LIMIT_WRITE: str = Field(default="30/minute", description="Rate limit for write operations")
 
-    # Geocoding API keys
-    TIANDITU_API_KEY: str | None = Field(default=None, description="天地图 API key for reverse geocoding")
-    GOOGLE_API_KEY: str | None = Field(default=None, description="Google Geolocation API key")
-    UNWIRED_API_TOKEN: str | None = Field(default=None, description="Unwired Labs API token")
+    # 高德地图 API (geocoding)
     AMAP_KEY: str | None = Field(default=None, description="高德地图 Web API key")
     AMAP_SECRET: str | None = Field(default=None, description="高德地图安全密钥")
-    BAIDU_MAP_AK: str | None = Field(default=None, description="百度地图服务端 AK")
 
-    # Geocoding cache
+    # Geocoding
+    GEOCODING_DEFAULT_IMEI: str = Field(default="868120334031363", description="Default IMEI for AMAP geocoding API")
     GEOCODING_CACHE_SIZE: int = Field(default=10000, description="Max geocoding cache entries")
 
     # Track query limit
     TRACK_MAX_POINTS: int = Field(default=10000, description="Maximum points returned by track endpoint")
 
+    # Data retention
+    DATA_RETENTION_DAYS: int = Field(default=90, description="Days to keep location/heartbeat/alarm/attendance/bluetooth records")
+    DATA_CLEANUP_INTERVAL_HOURS: int = Field(default=24, description="Hours between automatic cleanup runs")
+
     model_config = {"env_file": ".env", "env_file_encoding": "utf-8", "extra": "ignore"}