Refactor backend to SQLModel; reset schema; add Company OS endpoints

backend/app/api/hr.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlmodel import Session, select
+
+from app.api.utils import log_activity
+from app.db.session import get_session
+from app.models.hr import EmploymentAction, HeadcountRequest
+from app.schemas.hr import EmploymentActionCreate, HeadcountRequestCreate, HeadcountRequestUpdate
+
+router = APIRouter(prefix="/hr", tags=["hr"])
+
+
+@router.get("/headcount", response_model=list[HeadcountRequest])
+def list_headcount_requests(session: Session = Depends(get_session)):
+    return session.exec(select(HeadcountRequest).order_by(HeadcountRequest.id.desc())).all()
+
+
+@router.post("/headcount", response_model=HeadcountRequest)
+def create_headcount_request(payload: HeadcountRequestCreate, session: Session = Depends(get_session)):
+    req = HeadcountRequest(**payload.model_dump())
+    session.add(req)
+    session.commit()
+    session.refresh(req)
+    log_activity(session, actor_employee_id=req.requested_by_manager_id, entity_type="headcount_request", entity_id=req.id, verb="submitted")
+    session.commit()
+    return req
+
+
+@router.patch("/headcount/{request_id}", response_model=HeadcountRequest)
+def update_headcount_request(request_id: int, payload: HeadcountRequestUpdate, session: Session = Depends(get_session)):
+    req = session.get(HeadcountRequest, request_id)
+    if not req:
+        raise HTTPException(status_code=404, detail="Request not found")
+
+    data = payload.model_dump(exclude_unset=True)
+    for k, v in data.items():
+        setattr(req, k, v)
+
+    session.add(req)
+    session.commit()
+    session.refresh(req)
+    log_activity(session, actor_employee_id=req.requested_by_manager_id, entity_type="headcount_request", entity_id=req.id, verb="updated", payload=data)
+    session.commit()
+    return req
+
+
+@router.get("/actions", response_model=list[EmploymentAction])
+def list_employment_actions(session: Session = Depends(get_session)):
+    return session.exec(select(EmploymentAction).order_by(EmploymentAction.id.desc())).all()
+
+
+@router.post("/actions", response_model=EmploymentAction)
+def create_employment_action(payload: EmploymentActionCreate, session: Session = Depends(get_session)):
+    action = EmploymentAction(**payload.model_dump())
+    session.add(action)
+    session.commit()
+    session.refresh(action)
+    log_activity(session, actor_employee_id=action.issued_by_employee_id, entity_type="employment_action", entity_id=action.id, verb=action.action_type, payload={"employee_id": action.employee_id})
+    session.commit()
+    return action