PlayerStats API

Changed

• Reduced final plugin jar size.
• Removed unused Maven Shade packaging for a cleaner lightweight jar.
• Removed Maven descriptor metadata from the final jar.
• Disabled Java debug metadata in release classes.
• Updated Palantir Java Format to 2.90.0 for compatibility with the current JDK.

Fixed

• /statsreload now reports completion after stats reload actually finishes.
• HTTP server executor is now shut down when the plugin stops.
• CORS allowed methods now match the API surface: GET, OPTIONS.