- Created zcgo.go with defaultCGO_ENABLED constant (Go 1.24 pattern) - Updated parseGoVersion to panic on unexpected input instead of fallback - Added runtime.(*Func).Name stub to symtab.go for Go 1.21/1.22 compatibility - Removed go1.23 build constraint from demo - Removed internal/buildcfg package (replaced by zcgo.go) These changes ensure the demo works across Go 1.21+ versions. 🤖 Generated with [codeagent](https://github.com/qbox/codeagent) Co-authored-by: luoliwoshang <luoliwoshang@users.noreply.github.com>