Fix diag import path (spaces.config not spaces.zero.config); SPACES_ZERO_GPU=1 confirmed

app.py

@@ -58,7 +58,13 @@ 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)
+# Correct import path: Config lives at spaces.config.Config (top-level config module),
+# not spaces.zero.config. Wrapped in try so a future API change doesn't crash startup.
+try:
+    from spaces.config import Config as _spcfg
+    print(f"[kpaa-backend] spaces.Config.zero_gpu={_spcfg.zero_gpu}", flush=True)
+except Exception as e:
+    print(f"[kpaa-backend] could not read spaces.Config: {e!r}", flush=True)
 
 
 @spaces.GPU(duration=1)
@@ -67,8 +73,8 @@ def _zerogpu_startup_canary() -> None:
 
 
 print(
-    f"[kpaa-backend] canary marked? "
-    f"{getattr(_zerogpu_startup_canary, 'zerogpu', 'NO')}",
+    f"[kpaa-backend] canary 'zerogpu' attr: "
+    f"{getattr(_zerogpu_startup_canary, 'zerogpu', '<not set — decorator was no-op>')}",
     flush=True,
 )
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