v1.8: Go 1_21 Upgrade + Dependency Updates + Fix go vet warnings + pprof production security hardening

[devfeel]

v1.8 Release Notes

Highlights

Go 1_21 Upgrade + Dependency Updates + Fix go vet warnings + pprof production security hardening

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⬆️ Upgrade

• Go version upgraded to 1_21
• golang_org/x/net upgraded to v0_23_0

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🐛 Bug Fixes

Issue	Description
#276	Resolve go vet warnings across codebase
-	Fix loop variable capture in cache_runtime_test_go
-	Fix sync_Pool copy warning in server_test_go
-	Remove unreachable code in session/session_go

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🔒 Security

Change	Description
-	pprof is now only enabled in development mode

⚠️ Breaking Change: pprof is no longer available in production by default. To enable, explicitly set RunMode = "development".

// Enable pprof (development only)
app_SetDevelopmentMode()
app_SetPProfConfig(true, 8080)

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🔧 Improvements

• Use keyed fields for HideReaddirFS struct in router_go
• Improve code clarity and reduce warnings

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Full Changelog: v1_7.22...v1_7.23\

**2026.03.02 at ShangHai.