feat(14-01): add site_id device filter, wireless data endpoints, and frontend API clients

- Add site_id and sector_id query parameters to devices list endpoint
- Add get_device_registrations and get_device_rf_stats to link_service
- Add RegistrationResponse, RFStatsResponse schemas to link.py
- Add /registrations and /rf-stats endpoints to links router
- Add sectorsApi frontend client (list, create, update, delete, assignDevice)
- Add wirelessApi frontend client (links, registrations, RF stats, unknown clients)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/routers/links.py

@@ -18,7 +18,12 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from app.database import get_db
 from app.middleware.tenant_context import CurrentUser, get_current_user
 from app.routers.devices import _check_tenant_access
-from app.schemas.link import LinkListResponse, UnknownClientListResponse
+from app.schemas.link import (
+    LinkListResponse,
+    RegistrationListResponse,
+    RFStatsListResponse,
+    UnknownClientListResponse,
+)
 from app.services import link_service
 
 router = APIRouter(tags=["links"])
@@ -73,6 +78,38 @@ async def list_site_links(
     return await link_service.get_site_links(db=db, tenant_id=tenant_id, site_id=site_id)
 
 
+@router.get(
+    "/tenants/{tenant_id}/devices/{device_id}/registrations",
+    response_model=RegistrationListResponse,
+    summary="List device wireless registrations",
+)
+async def list_device_registrations(
+    tenant_id: uuid.UUID,
+    device_id: uuid.UUID,
+    current_user: CurrentUser = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+) -> RegistrationListResponse:
+    """Get latest wireless registration data for a device (most recent per MAC)."""
+    await _check_tenant_access(current_user, tenant_id, db)
+    return await link_service.get_device_registrations(db=db, tenant_id=tenant_id, device_id=device_id)
+
+
+@router.get(
+    "/tenants/{tenant_id}/devices/{device_id}/rf-stats",
+    response_model=RFStatsListResponse,
+    summary="List device RF monitor stats",
+)
+async def list_device_rf_stats(
+    tenant_id: uuid.UUID,
+    device_id: uuid.UUID,
+    current_user: CurrentUser = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+) -> RFStatsListResponse:
+    """Get latest RF monitor stats for a device (most recent per interface)."""
+    await _check_tenant_access(current_user, tenant_id, db)
+    return await link_service.get_device_rf_stats(db=db, tenant_id=tenant_id, device_id=device_id)
+
+
 @router.get(
     "/tenants/{tenant_id}/devices/{device_id}/unknown-clients",
     response_model=UnknownClientListResponse,