Update Highlights

This release focuses on stability, diagnostics, database safety, and advancement generation reliability.

Added

• New read-only /aach doctor [page] diagnostics covering:
  • YAML/configuration
  • Java & server platform
  • Integrations
  • Database health
  • Queue state
• Added missing permissions and improved player-only command feedback.
• Added additional regression and descriptor tests.
• Added Maven Wrapper and Java 21 / 25 CI coverage.

Fixed

• Reworked /aach generate forced regeneration.
• Forced generation now performs:
  • Batched deletion
  • A single Bukkit.reloadData()
  • Batched recreation
• Already-deleted advancement files are handled safely.
• Generation failures now stop immediately, log once, suppress false success messages, and correctly release the generation lock.
• Moved /aach inspect Bukkit interactions back to the main thread.
• Fixed cached-statistic database write confirmation and retry behavior.
• Serialized JDBC access to improve database consistency and thread safety.

Changed

• Minimum supported environment is now:
  • Paper / Purpur 1.21+
  • Java 21+
• New installations now default to SQLite.
• Existing H2 databases remain fully supported with no migration required.
• Updated PostgreSQL JDBC to 42.7.13.
• Preserved relocated JDBC service providers.
• Startup advancement generation remains additive and does not trigger a server data reload.
• Root and plugin modules now use Maven ${revision} versioning.
• Improved plugin descriptor/version validation.

Maintenance

• Expanded automated test coverage.
• Refreshed changelog and project documentation.
• General build, database, and reliability improvements.