v3.4.2

Portable Agent Plugins 1.0 package with OpenAI and Codex metadata,
bundled skills, MCP configuration, and logo. SHA256SUMS covers the ZIP.

Package validation does not establish OpenAI public-directory approval.
Digital-goods commerce requires OpenAI policy review. Live MCP/OAuth
tests, demo recording, reviewer access, scans and attestations must be
completed before directory submission.
OpenAI review preparation.

What's Changed

• Fix release dependency caching and prepare v3.4.1 by @marcopesani in #20

Full Changelog: v3.4.0...v3.4.2