Announce releases in repo and org Discussions #166

Is your feature request related to a problem? Please describe.

Not stated in the original issue.

Describe the solution you'd like

Not stated in the original issue.

Describe alternatives you've considered

Not stated in the original issue.

Additional context

Goal

Post each release to GitHub Discussions in two places, matching codeanalyzer-typescript/-python:

• Repo-level — the existing softprops/action-gh-release publish step opens a Discussion linked to the release (category Announcements), seeded from release-notes.md. Needs the workflow permissions: to grant discussions: write.
• Org-level — a new step posts the same body into codellm-devkit/.github → Announcements via a createDiscussion GraphQL mutation, authenticated by the org-level ORG_DISCUSSIONS_TOKEN secret. continue-on-error so a failed org post never sinks an otherwise-good release.

Prerequisites (done)

• Discussions enabled on this repo; Announcements category exists.
• ORG_DISCUSSIONS_TOKEN org secret has repo scope.

Done when

Both discussion posts appear on the next release. Patch bump (gradle.properties 2.4.1 → 2.4.2) included so a release can exercise it.