feat: expand bgp observability surfaces

backend/app/api/v1/bgp.py

@@ -11,6 +11,7 @@ from app.models.bgp_anomaly import BGPAnomaly
 from app.models.bgp_incident import BGPIncident
 from app.models.bgp_observation import BGPObservation
 from app.models.user import User
+from app.services.bgp_collectors import build_bgp_collector_coverage
 
 router = APIRouter()
 
@@ -108,6 +109,35 @@ async def get_bgp_event_summary(
     }
 
 
+@router.get("/collectors")
+async def list_bgp_collectors(
+    current_user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    data = await build_bgp_collector_coverage(db, source_filter=BGP_SOURCES)
+    return {
+        "total": len(data),
+        "data": data,
+    }
+
+
+@router.get("/collectors/summary")
+async def get_bgp_collector_summary(
+    current_user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    collectors = await build_bgp_collector_coverage(db, source_filter=BGP_SOURCES)
+    active_collectors = [item for item in collectors if item["observation_count"] > 0]
+    return {
+        "total": len(collectors),
+        "active_collectors": len(active_collectors),
+        "observed_prefixes": sum(item["prefix_count"] for item in active_collectors),
+        "observed_origins": sum(item["origin_asn_count"] for item in active_collectors),
+        "recent_24h_events": sum(item["recent_24h_observation_count"] for item in active_collectors),
+        "recent_7d_events": sum(item["recent_7d_observation_count"] for item in active_collectors),
+    }
+
+
 @router.get("/events/{event_id}")
 async def get_bgp_event(
     event_id: int,