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/routers/beacons.py

@@ -8,6 +8,8 @@ import math
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.dependencies import require_write
+
 from app.database import get_db
 from app.schemas import (
     APIResponse,
@@ -64,6 +66,7 @@ async def get_beacon(beacon_id: int, db: AsyncSession = Depends(get_db)):
     response_model=APIResponse[BeaconConfigResponse],
     status_code=201,
     summary="添加信标 / Create beacon",
+    dependencies=[Depends(require_write)],
 )
 async def create_beacon(body: BeaconConfigCreate, db: AsyncSession = Depends(get_db)):
     existing = await beacon_service.get_beacon_by_mac(db, body.beacon_mac)
@@ -77,6 +80,7 @@ async def create_beacon(body: BeaconConfigCreate, db: AsyncSession = Depends(get
     "/{beacon_id}",
     response_model=APIResponse[BeaconConfigResponse],
     summary="更新信标 / Update beacon",
+    dependencies=[Depends(require_write)],
 )
 async def update_beacon(
     beacon_id: int, body: BeaconConfigUpdate, db: AsyncSession = Depends(get_db)
@@ -91,6 +95,7 @@ async def update_beacon(
     "/{beacon_id}",
     response_model=APIResponse,
     summary="删除信标 / Delete beacon",
+    dependencies=[Depends(require_write)],
 )
 async def delete_beacon(beacon_id: int, db: AsyncSession = Depends(get_db)):
     success = await beacon_service.delete_beacon(db, beacon_id)