v0.13.0 — Sanskrit data-hub P-D3 (public data + tools directory page)

Added

• Sanskrit data-hub P-D3: public data + tools directory page. Executor:
  Opus 4.8 (claude-opus-4-8), MG ruling D-HUB-7 (06-07-2026), handoff H236.
  • directory/index.html
    (live at gasyoun.github.io/kosha/directory)
    — the first curated directory for Sanskrit computational linguistics: 9
    public datasets (downloadable), 6 restricted (listed "on request"), and 8
    external stacks (vidyut/Ambuda, Sanskrit Heritage/INRIA, Samsaadhanii/SCL,
    DharmaMitra, DCS, VedaWeb, Cologne CDSL) with what-it-does / how-to-call /
    license / our-relation.
  • scripts/build_directory.py
    renders it from data/manifest/datasets.json
    • a new data/manifest/external_tools.json
      (single sources — no facts hand-copied into HTML). Carries schema.org
      Dataset JSON-LD per public asset on an Organization @id spine (SEO
      playbook P0) — the lever for Google/Yandex Dataset Search indexing.
  • datasets.json gained a release_asset field on the 7 released rows so the
    page can build 1-click download URLs from the manifest.
  • Test invariants: tests/test_directory.py
    (one Dataset node per public row, @id spine, no restricted-download or
    gitignored-path leak). Wired from the README + docs-site landing footer.