Release WaveMind v2.9.0

[CaspianG]

Summary

• release the accepted trusted agent experience, safety, portability, SDK, and Work Agent slices as WaveMind 2.9.0
• synchronize package, container, Helm, remote, serverless, and cloud deployment versions
• document the release while preserving the existing strict production-claim gates

Validation

• pytest -q: 917 passed, 5 skipped
• ruff check .: passed
• targeted release tests: 69 passed
• Python wheel and sdist build: passed
• twine check dist/*: passed
• clean wheel install with remember/query smoke: passed
• TypeScript SDK tests and packed clean-install smoke: 8 passed
• production Docker image build and version smoke: passed
• strict release claims: core release ready, limited to admitted claims

Scope

The isolated Goal 4 quality experiment is not included in this release. No quality-admission thresholds or production gates are weakened.