firewall 2

Fold the DSH tool surface per request + ChainGuard firewall (high-risk block + exfil-chain detection + anti-obfuscation) + BM25/bge-m3 hybrid tools_search. Shrinks schema tokens 80-90% while keeping selection accuracy. v0.2.0 adds a semantic retrieval leg

Prompt hygiene, observability, and policy middleware for DeepSeek Harness