Prepare v3.10.4 release metadata

[dorukardahan]

Summary

• Move the merged review-routing correction from Unreleased into a dated v3.10.4 changelog section.
• Synchronize v3.10.4 across package manifests, lockfile fields, runtime/skill metadata, benchmark and starter snapshots, and public install references.
• Keep this change preparation-only: no tag, publication, release, or runtime behavior change.

Verification

• npm --workspace zeroapi exec vitest run __tests__/version-sync.test.ts __tests__/classifier.test.ts __tests__/router.test.ts __tests__/config.test.ts (74 passed)
• node --test scripts/__tests__/release-preflight.test.mjs (7 passed)
• python3 -m unittest discover -s integrations/hermes -p 'test_*.py' (237 passed)
• npm test (319 plugin, 85 script, and 237 Hermes tests passed)
• npm run release:check
• npm audit --omit=dev (0 production vulnerabilities)
• git diff --check

Risk

Low. The diff changes release metadata and version strings only.

Closes #82

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