feat(routers): add executions, backups, and settings endpoints

backend/app/routers/backups.py

@@ -1,4 +1,34 @@
-from fastapi import APIRouter
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from typing import List
+from app.database import get_db
+from app.models import Backup
+from app.schemas import Backup as BackupSchema
 
 router = APIRouter(prefix="/api/backups", tags=["backups"])
-# Will be implemented in later tasks
+
+@router.get("/", response_model=List[BackupSchema])
+async def list_backups(db: AsyncSession = Depends(get_db)):
+    result = await db.execute(select(Backup).order_by(Backup.created_at.desc()))
+    backups = result.scalars().all()
+    return backups
+
+@router.get("/{backup_id}", response_model=BackupSchema)
+async def get_backup(backup_id: int, db: AsyncSession = Depends(get_db)):
+    result = await db.execute(select(Backup).where(Backup.id == backup_id))
+    backup = result.scalar_one_or_none()
+    if not backup:
+        raise HTTPException(status_code=404, detail="Backup not found")
+    return backup
+
+@router.delete("/{backup_id}")
+async def delete_backup(backup_id: int, db: AsyncSession = Depends(get_db)):
+    result = await db.execute(select(Backup).where(Backup.id == backup_id))
+    backup = result.scalar_one_or_none()
+    if not backup:
+        raise HTTPException(status_code=404, detail="Backup not found")
+    
+    await db.delete(backup)
+    await db.commit()
+    return {"message": "Backup deleted"}