PR_26175_ALFA_012: Alfa batch B parent/child tables

[ToolboxAid]

Summary

• Converts the PR_26174_ALFA_009-game-hub-parent-child-table-layout #103-PR_26174_ALFA_011-game-hub-readiness-output-child-table #105 Alfa Batch B source chain into a current-main report artifact.
• Documents that Game Hub parent/child table behavior is already present on current main.
• Includes required codex review artifacts and validation notes.

Validation

• Branch gate after PR 011: PASS
• git diff --check: PASS
• Targeted Playwright: BLOCKED, Chromium executable missing.

ZIP

• tmp/PR_26175_ALFA_012-alfa-batch-b-parent-child-tables_delta.zip

[ToolboxAid]

OWNER-approved closure: superseded by merged consolidated Alfa parent/child and Game Hub PRs #148 and #149, plus merged OWNER_055 action plan #156. No branch deletion requested.