ci: align workflow filenames on the estate standard

[vreshch]

Aligns this repo on the estate workflow naming standard - one reserved filename per role. See playbooks/pipeline-naming.md.

from	to	role
publish.yml	release.yml	produce the artifact
release-train.yml	train.yml	scheduled weekly train

The dispatch line is updated in the same commit. The train runs gh workflow run publish.yml by filename - renaming the file without that edit leaves the train departing every Friday while nothing publishes, and a dispatch to a missing workflow does not fail the train, so it would have been silent.

Prerequisite already merged: agentage/automation#397 makes the Friday watchdog resolve the train workflow at runtime instead of hardcoding release-train.yml, so the guard keeps working across this rename.

[github-actions]

🎉 PR Validation ✅ PASSED

Commit: 8cb7e7fffc218ffd8a781e6eeba882cd1a8ef6b1
Branch: chore/workflow-naming

Checks:

• ✅ Release guard (no version/changelog changes)
• ✅ Dependencies installed
• ✅ Type check passed
• ✅ Linting passed
• ✅ Format check passed
• ✅ Tests + coverage passed
• ✅ Build successful

Ready to merge! ✨

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⏰ Generated at: 2026-08-10T23:43:53.836Z