feat(userbot,api,frontend): backfill stories and unbreak all-stories list

backend/src/api/routers/backfill.py

@@ -19,6 +19,11 @@ class BackfillRequest(BaseModel):
     full: bool = False
 
 
+class StoriesBackfillRequest(BaseModel):
+    account_id: int
+    peer_id: int
+
+
 class FetchMediaRequest(BaseModel):
     account_id: int
     chat_id: int
@@ -76,6 +81,16 @@ async def enqueue_backfill(
     return EnqueueResponse(job_id=job_id)
 
 
+@router.post("/stories/backfill", status_code=201)
+async def enqueue_stories_backfill(
+    pool: FromDishka[asyncpg.Pool], body: StoriesBackfillRequest
+) -> EnqueueResponse:
+    job_id = await enqueue(
+        pool, body.account_id, "backfill_stories", {"peer_id": body.peer_id}
+    )
+    return EnqueueResponse(job_id=job_id)
+
+
 @router.post("/media/fetch", status_code=201)
 async def enqueue_fetch_media(
     pool: FromDishka[asyncpg.Pool], body: FetchMediaRequest