Ultra optimizations

[WeirdPhrog]

• Optimize building auth detection by checking auth state during spatial query and stopping on the first matching block
• Restrict signage destroy handling to supported paintable entities
• Add shared IsPaintable helper for signage hooks
• Filter OnEntityBuilt signage updates by supported paintable types
• Refactored state update payload structure and removed duplicated server_info
• Added custom JSON serialization for Vector3, Quaternion, and ulong values - no more ToString() allocs
• Replaced string-based position, rotation, and team payload fields with typed values
• Cached map grid coordinate strings to reduce repeated allocations
• Added Execute overloads for common success/error callback combinations
• Refactored response deserialization into TryDeserializeResponse
• Preserved previous behavior on parse errors by skipping typed success callback
• Simplified API request call sites and removed unused error parameters
• Replace coroutine-based UnityWebRequest execution with UniTask and a local cancellation timeout. This manually aborts hanging requests before the underlying curl timeout, preventing the native crashes observed when many requests time out simultaneously, while keeping existing callbacks and error handling behavior