refactor(workbench): remove duplicate migration relocation

[mldangelo-oai]

Summary

Remove a duplicate legacy migration relocation that is unreachable during normal workbench upgrades.

Changes

• Keep warning-migration relocation and conflicting-history checks in the existing outer migration normalizer.
• Delete the inner execution-profile helper's duplicate relocation branch and related bookkeeping.

Testing

• bun test tests-ts/runtime.test.ts tests-ts/deep-scan-workbench.test.ts --timeout 30000 — passed, including colliding historical migrations, existing public databases, preserved completion warnings, rejected malformed histories, and Deep Scan schema repairs.
• pnpm run types — passed.
• python3 -I -B Python syntax validation — passed.
• git diff --check — passed.

Risk and rollout

The outer normalizer already relocates the historical warning migration, or rejects conflicting history, before the inner execution-profile helper runs. Existing append-only migrations, persisted warning data, legacy execution settings, and unsupported-history checks remain unchanged.

Public disclosure review

• No customer, partner, prospect, or user identities, data, or identifying details are included.
• No credentials, personal data, private source, scan findings, or nonpublic links or tickets are included.
• I reviewed the branch name, title, description, commits, changes, comments, logs, screenshots, attachments, and links for public disclosure.

[mldangelo-oai]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Delightful!

Reviewed commit: 2c72c53f6f

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[chatgpt-codex-connector]

Security review completed. No security issues were found in this pull request.

Reviewed commit: 2c72c53f6f

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[zcrab-oai]

Looks good. Removes duplicate migration relocation while preserving historical database compatibility and transactional safety.