Per-environment "keep last N versions" setting (default 5, null for
unlimited). Nightly scheduled job at 03:00 deletes old versions from
both database and disk, skipping any version that is currently deployed.
Full stack:
- V6 migration: adds jar_retention_count column to environments
- Environment record, repository, service, admin controller endpoint
- JarRetentionJob: @Scheduled nightly, iterates environments and apps
- UI: retention policy editor on admin Environments page with
toggle between limited/unlimited and version count input
- AppVersionRepository.delete() for version cleanup
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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