10 PG First Native Driven

Verdict PG_HOSTED_HARDCODE_REMAINS. Facts are in PG, but Directus owns/changes enforcement. Critical guarantees are source-text scans, booleans, missing constraints/FKs. Fixed code controls roots, depth, gates, probes, capabilities, signal physical mappings, signoff classes, strategy branches, and fingerprint components. Scorecard contains literal true for fact_source_in_pg/no_ui_app_logic and equates no planner-v2 name with no hardcoded eligibility. Writable registries do not make logic PG-driven.