Better integration of sqlite3 database

backend/app/routers/proposal.py

@@ -1,11 +1,13 @@
-from fastapi import APIRouter
-from typing import List, Optional
-from app.data.data import proposals
-from app.models import Proposal  # Import the Address model
-
+# app/routers/proposal.py
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from typing import List
+from app.schemas import Proposal as ProposalSchema
+from app.models import Proposal as ProposalModel
+from app.dependencies import get_db
 
 router = APIRouter()
 
-@router.get("/", response_model=List[Proposal])
-async def get_proposals():
-    return proposals
+@router.get("/", response_model=List[ProposalSchema])
+async def get_proposals(db: Session = Depends(get_db)):
+    return db.query(ProposalModel).all()