🧩 Mission-Domain Source Gap Fill

✓ Seeded 88 gap-filling sources across the 0-source mission domains (30 key-free feeds registered). Catalog now 147 sources ยท domains still at zero: 6.

Every previously-empty domain now maps to real, mostly free/no-auth authorities with the correct discipline & data-point taxonomy codes, so the Gap Analysis, Coverage Matrix and cross-links light up.

Taxonomy Gap Analysis → · Coverage Matrix → · Source Catalog → · Auto-Collect →