New:
- luaH_getstr inline v2: safe bucket-index cache with SSE2 prefetch (16384 entries)
- lua_rawgeti inline v2: safe array direct access + bucket-index cache (8192 entries)
- Freeze detection watchdog: dumps active feature states when main thread stalls >10s
- HD client crash fix: SEH-protected mimalloc allocator with automatic fallback to original allocator on exception
Fixed:
- ACCESS_VIOLATION on HD/non-standard clients caused by mimalloc heap layout differences
- World load freeze from old lua_rawgeti pointer cache
- Infinite freeze from MSGPUMP_RC1 hook