Add meta router

app/routers/meta.py

@@ -0,0 +1,37 @@
+"""Health, stats and root meta routes."""
+import datetime
+
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+
+from .. import models
+from ..database import get_db
+
+router = APIRouter(tags=["meta"])
+
+
+@router.get("/")
+def root():
+    return {
+        "name": "TrainHub API",
+        "version": "1.0.0",
+        "docs": "/docs",
+        "health": "/health",
+    }
+
+
+@router.get("/health")
+def health():
+    return {"status": "ok", "time": datetime.datetime.utcnow().isoformat() + "Z"}
+
+
+@router.get("/stats")
+def stats(db: Session = Depends(get_db)):
+    return {
+        "users": db.query(models.User).count(),
+        "models": db.query(models.ModelRepo).count(),
+        "datasets": db.query(models.DatasetRepo).count(),
+        "spaces": db.query(models.SpaceRepo).count(),
+        "jobs": db.query(models.TrainingJob).count(),
+        "running_jobs": db.query(models.TrainingJob).filter(models.TrainingJob.status == "running").count(),
+    }