[Task] Triage legacy root files and complete cleanup closeout

[ashleyshaw]

Deliverables

1. Decision record for audit_script.rb and github.code-workspace (keep, move, or remove).
2. Applied change for approved disposition.
3. Final cleanup summary with before/after root file list.

Acceptance Criteria

• Each remaining legacy root file has a documented disposition rationale.
• Any moves/removals are reflected in references and validation checks.
• Final root listing contains only intentional governance/configuration files.
• Closeout notes include rollback-safe guidance.

Spec Source

• .github/projects/active/root-cleanup-dependency-audit-2026-06-03/openspec-strict/children/01-4-task-triage-legacy-root-files-and-closeout.md

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Definition of Ready (DoR)

• Task described and scoped
• Estimate added if relevant

Definition of Done (DoD)

• Task completed and documented
• Changelog entry prepared for PR
• PR uses correct branch prefix

[linear-code]

LS-920