Add telegram bot

backend/app/api/v1/assignments.py

@@ -9,7 +9,7 @@ from sqlalchemy.orm import selectinload
 
 from app.api.deps import DbSession, CurrentUser
 from app.models import (
-    Assignment, AssignmentStatus, Participant, Challenge, User,
+    Assignment, AssignmentStatus, Participant, Challenge, User, Marathon,
     Dispute, DisputeStatus, DisputeComment, DisputeVote,
 )
 from app.schemas import (
@@ -19,6 +19,7 @@ from app.schemas import (
 )
 from app.schemas.user import UserPublic
 from app.services.storage import storage_service
+from app.services.telegram_notifier import telegram_notifier
 
 router = APIRouter(tags=["assignments"])
 
@@ -345,6 +346,17 @@ async def create_dispute(
     await db.commit()
     await db.refresh(dispute)
 
+    # Send notification to assignment owner
+    result = await db.execute(select(Marathon).where(Marathon.id == marathon_id))
+    marathon = result.scalar_one_or_none()
+    if marathon:
+        await telegram_notifier.notify_dispute_raised(
+            db,
+            user_id=assignment.participant.user_id,
+            marathon_title=marathon.title,
+            challenge_title=assignment.challenge.title
+        )
+
     # Load relationships for response
     result = await db.execute(
         select(Dispute)