Diagnostic: print SPACES_ZERO_GPU env + canary marking status

app.py

@@ -52,13 +52,25 @@ _gc_utils._json_schema_to_python_type = _safe_jstpt
 # ──────────────────────────────────────────────────────────────────────────
 
 
-# ─── ZeroGPU startup canary (module-level required) ───────────────────────
+# ─── ZeroGPU startup canary + diagnostics ─────────────────────────────────
+print(f"[kpaa-backend] SPACES_ZERO_GPU={os.environ.get('SPACES_ZERO_GPU')!r}", flush=True)
+print(f"[kpaa-backend] SPACE_ID={os.environ.get('SPACE_ID')!r}", flush=True)
+
 import spaces  # noqa: E402
 
+print(f"[kpaa-backend] spaces.Config.zero_gpu={spaces.zero.config.Config.zero_gpu}", flush=True)
+
 
 @spaces.GPU(duration=1)
 def _zerogpu_startup_canary() -> None:
     return None
+
+
+print(
+    f"[kpaa-backend] canary marked? "
+    f"{getattr(_zerogpu_startup_canary, 'zerogpu', 'NO')}",
+    flush=True,
+)
 # ──────────────────────────────────────────────────────────────────────────