Remove HR completely: delete hr API; baseline alembic without HR tables

backend/app/api/hr.py

@@ -1,16 +0,0 @@
-"""HR module removed.
-
-Mission Control now uses the org/people module (employees) for provisioning.
-"""
-
-from fastapi import APIRouter
-
-router = APIRouter(prefix="/hr", tags=["hr"])
-
-
-@router.get("/")
-def hr_removed():
-    return {
-        "ok": False,
-        "error": "HR module removed; use /employees endpoints for provisioning",
-    }