Add HF dataset card metadata to state_admin_rules_cid README

US_ADMINISTRATIVE_RULES/parsed/parquet/state_admin_rules_cid/README.md

@@ -1,3 +1,21 @@
+---
+pretty_name: US State Administrative Rules CID Parquet
+language:
+  - en
+license: other
+task_categories:
+  - text-retrieval
+  - feature-extraction
+tags:
+  - legal
+  - administrative-rules
+  - ipfs-cid
+  - parquet
+  - embeddings
+size_categories:
+  - 1K<n<10K
+---
+
 # US State Administrative Rules (CID-Keyed Parquet)
 
 This folder contains a multi-state administrative-rules dataset exported as Parquet and indexed by IPFS content ID (`ipfs_cid`).