chore: complete audit verification and release preparation

[ClaudiuCeia]

Scope

Complete end-to-end verification and release preparation after the remaining quality-audit findings are resolved.

Acceptance criteria

• Run the full test suite, coverage thresholds, typecheck, lint, formatting check, build, dependency audit, package dry-run, and benchmark regression check.
• Verify supported Node.js CI versions (22.12 and 24) and Bun behavior.
• Confirm the worktree contains only intended changes and all audit commits are pushed.
• Add concise changesets for affected published packages with user-visible behavior and performance notes.
• Validate trusted npm publishing configuration without introducing long-lived tokens.
• Record any residual limitations, especially best-effort multi-file rollback and conservative regex rejection.
• Trigger publishing only with explicit release approval.