Upstream kitsune API commits to review

[github-actions]

New mozilla/kitsune commits touch code that serves (or gates) the SUMO APIs this scraper depends on.

Review each: does it change serialized fields, filtering, throttling, or request handling for /api/2/question|answer/ or /api/1/kb/? If field-affecting, run uv run python check_schema.py --headless and update docs/kitsune-api-commits-2026.md.

• 7fa59b505 2026-07-02 — Always display sanitized_product_version if set
  (kitsune/questions/models.py)
• f742dc82b 2026-07-01 — Display product version for more products
  (kitsune/questions/models.py)
• 6570c5718 2026-06-30 — Conditionally add product version
  (kitsune/questions/models.py)
• abe8c2a68 2026-06-02 — Add product version to question cards
  (kitsune/questions/models.py)