Xconomy_Reload

• Added automatic migration for missing Transaction-Tracking settings in existing config.yml files.
• Fixed transaction tracking showing null when tracking is unavailable; the status message now uses the configured language file.
• Improved legacy transaction display so missing tracking metadata is shown as unknown instead of a literal null value.
• Updated Modrinth checks to select the matching platform artifact only: Bukkit, Paper-family, Sponge 7, or Sponge 8.
• Migrated Sponge update checks from Ore to Modrinth and direct platform-specific download files.
• Log update-check results during startup and send administrators a clickable in-game link to the matching download file.
• Updated the release workflow to build with Java 21, which is required by the bundled Adventure libraries.

Use [beta] in the release commit message to publish a Modrinth beta and a GitHub prerelease. Use [release] to publish a Modrinth release and a normal GitHub release.