xfy f3f92c7922 feat(lua): add LState pool configuration and fix coroutine error handling
- Add LStatePoolInitialSize and LStatePoolMaxSize config fields
- Set pool defaults to 100 initial / 1000 max (matching MaxConcurrentCoroutines)
- Fix middleware to return 500 on coroutine init failure instead of continuing
- Pass pool config from server init to Lua engine with zero-value fallbacks

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-09 11:13:23 +08:00
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