Fix vocab_size: null → 129280 for larql show parser

index.json

@@ -13,7 +13,7 @@
   "intermediate_size": 2048,
   "moe_intermediate_size": 2048,
   "n_routed_experts": 256,
-  "vocab_size": null,
+  "vocab_size": 129280,
   "extract_level": "summary",
   "dtype": "f32",
   "median_var64_gate_proj": 0.108,