fix: jobs router session handling, schedule creation, and tests

- Use new session in background task for thread safety
- Fix schedule creation to associate with job
- Fix schedule endpoint return type
- Update tests to use AsyncClient
- Add missing tests for list, get, delete, schedule
- Add updated_at field to Schedule model

backend/app/models.py

@@ -63,6 +63,11 @@ class Schedule(Base):
     cron_expression = Column(String, nullable=False)
     enabled = Column(Boolean, default=True)
     created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(
+        DateTime,
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
 
     job = relationship("Job", back_populates="schedule")
 

backend/app/routers/jobs.py

@@ -2,9 +2,9 @@ from fastapi import APIRouter, Depends, HTTPException, BackgroundTasks
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy import select
 from typing import List
-from app.database import get_db
+from app.database import get_db, AsyncSessionLocal
 from app.models import Job, Schedule
-from app.schemas import JobCreate, JobUpdate, Job as JobSchema, ScheduleCreate
+from app.schemas import JobCreate, JobUpdate, Job as JobSchema, ScheduleCreate, Schedule as ScheduleSchema
 from backup.engine import BackupEngine
 
 router = APIRouter(prefix="/api/jobs", tags=["jobs"])
@@ -74,13 +74,14 @@ async def run_job(
     
     # Run in background
     async def execute():
-        engine = BackupEngine(db)
-        await engine.execute_job(job_id, triggered_by="manual")
+        async with AsyncSessionLocal() as session:
+            engine = BackupEngine(session)
+            await engine.execute_job(job_id, triggered_by="manual")
     
     background_tasks.add_task(execute)
     return {"message": "Job execution started"}
 
-@router.post("/{job_id}/schedule", response_model=JobSchema)
+@router.post("/{job_id}/schedule", response_model=ScheduleSchema)
 async def create_schedule(
     job_id: int,
     schedule: ScheduleCreate,
@@ -91,8 +92,10 @@ async def create_schedule(
     if not job:
         raise HTTPException(status_code=404, detail="Job not found")
     
-    db_schedule = Schedule(**schedule.model_dump())
+    schedule_data = schedule.model_dump()
+    schedule_data["job_id"] = job_id
+    db_schedule = Schedule(**schedule_data)
     db.add(db_schedule)
     await db.commit()
-    await db.refresh(job)
-    return job
+    await db.refresh(db_schedule)
+    return ScheduleSchema.model_validate(db_schedule)