chore: Remove investigation artifacts from CLI subscription PR

[0xtsotsi]

The CLI subscription integration (PR #18) includes investigation/development documentation files that should be removed before merging:

• investigation/FINAL-REPORT.md
• investigation/auth-code-map.md
• investigation/integration-plan.md
• investigation/persistence-analysis.md
• BEADS_AUDIT_REPORT.md

These are development artifacts, not production code.

Action needed: Run git rm -r investigation/ && git rm BEADS_AUDIT_REPORT.md before merging PR #18.

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[0xtsotsi]

Fixed! Removed investigation artifacts:\n- investigation/FINAL-REPORT.md\n- investigation/auth-code-map.md\n- investigation/integration-plan.md\n- investigation/persistence-analysis.md\n- BEADS_AUDIT_REPORT.md\n\nThese development documentation files have been removed from the branch.