v1.26.0 — 2019 fall catalogue

Adds a reviewed 2019 fall snapshot with 67 anime, 159 OP/ED records, first-party and cross-check provenance for every published song, and 62 official or licensed embeddable video metadata records. The public catalogue now covers 27 seasons, 1,875 unique anime pages, 4,124 OP/ED records, and 1,745 reviewed video metadata records. The registry-driven desktop sidebar and compact mobile menu now include 2019 fall. CI, Cloudflare production build, live API contract, representative byte parity, security headers, custom 404, and desktop/mobile browser checks passed. Unsupported mappings, unavailable or non-official media, raw research responses, secrets, private operational data, and runtime services remain outside the release.