data(software,game): add software category + 18k Wikidata records (→296k)

[Seungpyo1007]

Summary

Adds the new software category (TechEngine PR #42) + more Wikidata games — dataset 277,458 → 295,869 on the road to 1M.

• software — 11,611 software products from Wikidata (P31 = Q7397): name, release_date, developers, publishers, operating_systems, programming_languages, licenses, genres. Standalone/unscored, no brand FK. source_urls cite each Wikidata entity.
• game — 6,800 additional video games recovered from Q7889 subclasses (browser/arcade/mobile/etc.) that the initial direct-P31 pass (data(game): add game category + import 168,883 Wikidata games (→277k records) #115) missed. Deduped against the existing 168,883 by QID + slug (collisions get a QID suffix).
• Bumps engine submodule to the software-category pin; mirrors SOFTWARE_REQUIRED into app/validate.py.
• CI note: TechEngine PR data(mobile): import source variant supplements #42 also fixed a CI outage — GitHub switched runners to Node 24, which crashes actions/setup-python + cache: pip ("Maximum call stack size exceeded"); fixed by dropping the pip cache in test.yml.

All verified: false. python -m app.validate ✅ passed (295,869 records). Dump regenerated — v1/software/ (11,611) + 6,800 new v1/games/ pages + openapi + index (existing 168,883 game pages left untouched — surgical staging). No fabrication; every field from Wikidata.

Closes #1

[Seungpyo1007]

🤖 TechEngine · data validation

category    added     total records
software    11,611       295,869
game (+)     6,800

• python -m app.validate → ✅ passed (0 errors) across all 12 categories.
• New software category seeded from Wikidata Q7397; engine submodule bumped (TechEngine PR data(mobile): import source variant supplements #42).
• Dump: 11,611 software pages + 6,800 new game pages + openapi/index. Existing 168,883 game pages untouched.

[Seungpyo1007]

🤖 TechEngine · verify (Tier 0)

Real data + a CI fix:

• Every software/game record is a Wikidata entity; source_urls links to wikidata.org/wiki/<QID>. Fields are the entity's own statements (developer P178, publisher P123, OS P306, language P277, license P275, genre P136, date P577) — nothing invented.
• Extra games were de-duplicated against the existing catalogue by QID and slug before writing.
• Bundled CI fix: GitHub's runner Node 20→24 switch broke actions/setup-python pip-cache (stack overflow); removed cache: pip in the engine test.yml.

verified stays false. Safe to rebase-merge (submodule bump matches the auto-bump already on main).