PART A: verify kv_norm_w loaded correctly

tests/unit/test_part_a_decode_diagnostics.py

@@ -195,6 +195,13 @@ def main():
         dev = f"cuda:{li % NUM_GPUS}"
         if li in compressors: compressors[li].load(all_w, pfx, dev=dev)
         if li in indexers: indexers[li].load(all_w, f"{pfx}.indexer", dev=dev)
+    # Verify compressor kv_norm_w loaded correctly
+    for li in range(TEST_LAYERS):
+        if li in compressors and compressors[li].kv_norm_w is not None:
+            n = compressors[li].kv_norm_w
+            print(f"  L{li} compressor kv_norm_w: shape={tuple(n.shape)} |w|={n.abs().max().item():.4f}", flush=True)
+        elif li in compressors:
+            print(f"  L{li} compressor kv_norm_w: MISSING!", flush=True)
     print("Production components built")
 
     # Embedding + tokenizer