PR_26175_OWNER_052: add project work inventory

[ToolboxAid]

Summary

• Adds the permanent all-team Project Work Inventory report for OWNER_052.
• Adds OWNER_052 branch validation, requirement checklist, validation lane, and manual validation notes.
• Updates the scoped Codex changed-files and review-diff report artifacts.

Validation

• PASS: git diff --cached --check
• PASS: git rev-list --left-right --count origin/main...HEAD returned 0 0 before commit.
• PASS: repo-structured delta ZIP created and validated at tmp/PR_26175_OWNER_052-project-work-inventory_delta.zip.

Scope Notes

• Documentation/report only.
• No product, runtime, or UI files changed.
• No branches deleted, PRs closed, or stashes altered.
• Mixed local untracked files were left unstaged and untouched.