PR_26175_OWNER_055: add remaining open PR action plan

[ToolboxAid]

Summary

• Adds OWNER_055 report-only action plan for the remaining open PRs across Alfa/Alpha, Charlie, OWNER, and Gamma historical lanes.
• Includes per-PR team, title, branch, created date, age, draft/mergeable state, changed-file summary, superseded assessment, and recommended action.
• Recommends PR_26175_CHARLIE_010-system-health-history-and-closeout + 011-admin-submenu-alphabetical-order #155 as the primary merge candidate, stale Alfa/OWNER report PRs for closure, PR_26171_GAMMA_028-final-sqlite-clean-status-report #50 as hold, and PR_26175_ALFA_010-game-journey-progress-context-audit #135/[codex] Add Project Instructions governance addendums #85/PR_26171_ALPHA_046 game hub table standard rebuild #26 for deeper review.

Validation

• Read all Project Instructions.
• Used GitHub authority via gh pr view and gh pr list.
• git diff --name-only limited to required report files.
• git diff --check passed.
• Repo-structured ZIP: tmp/PR_26175_OWNER_055-remaining-open-pr-action-plan_delta.zip.

No PRs were merged or closed, no branches were deleted, and no runtime code was modified.