revert(bundle): restore type==='rtsp' gate on stream fallback

ONVIF cams legitimately have multiple streams (main+sub) stored in
camera_streams. Dropping the type gate synthesized a single "main"
row for ONVIF cams that lacked rows, hiding the multi-stream design
the kiosk's pick_stream relies on (area >= 0.2 → main, else sub).
The "(no stream)" symptom is a partial-import bug to chase separately;
the bundle fallback is for single-URL RTSP cams only. Also drop the
backfill migration that did the same insert at the DB layer.

server/src/plugins/service-store/migrations.ts

@@ -867,18 +867,4 @@ export const MIGRATIONS: readonly MigrationEntry[] = [
     addColumnIfNotExists(db, "displays", "actual_power_state_at", "TEXT");
   },
 
-  // Backfill any camera type with a direct RTSP URL. Earlier backfill only
-  // covered type=rtsp, but ONVIF imports can also retain rtsp_url.
-  (db: DatabaseSync) => {
-    db.exec(`
-      INSERT INTO camera_streams (camera_id, role, name, rtsp_uri, is_discovered)
-      SELECT c.id, 'main', 'Main', c.rtsp_url, 0
-        FROM cameras c
-       WHERE c.rtsp_url IS NOT NULL
-         AND c.rtsp_url != ''
-         AND NOT EXISTS (
-           SELECT 1 FROM camera_streams s WHERE s.camera_id = c.id
-         )
-    `);
-  },
 ];

server/src/shared/bundle.ts

@@ -209,7 +209,7 @@ export function generateBundle(
   const bundleCameras: BundleCamera[] = cameras.map((cam) => {
     const streams = repo.listCameraStreams(cam.id);
     const effectiveStreams = streams.length > 0 ? streams : (
-      cam.rtsp_url
+      cam.type === "rtsp" && cam.rtsp_url
         ? [{
           id: 0,
           role: "main" as const,