Cobblemon Realms Core v6.0.7

Fixes

• Fixed PvE Gym arenas sometimes loading as empty or leaving players falling into the void after a server restart.
• Fixed arena validation incorrectly treating unloaded or incomplete arena chunks as fully generated.
• Fixed the arena system sometimes considering a single remaining block sufficient to validate an entire arena.
• Fixed Electric-type arenas potentially being misidentified as fallback arenas because of their central Sea Lantern.
• Improved missing arena recovery so the correct schematic is rebuilt automatically when required.