nextwave2: merge fixes for issues #253 #241 #221 #210 #200 #179

[KooshaPari]

Summary

Wave 2 merge for next-item execution (6 lanes, one shipped issue per lane).

Included fixes

• feat: Task item 61 cliproxy #253: endpoint override support for provider-pinned codex models (f1ab6855)
• Merge: fix/circular-import-config and refactor/consolidation #241: enforce GitHub Copilot context length at 128K (05f894bf)
• [CodeScanning #144] go/clear-text-logging in pkg/llmproxy/executor/codex_websockets_executor.go:1298 #221: handle Kiro banned-account 403 payload path (947883cb)
• fix: filter out orphaned tool results from history and current context #210: broaden Kiro command tool alias handling (9fa8479d)
• nextwave2: merge fixes for issues #253 #241 #221 #210 #200 #179 #200: honor Gemini quota reset durations for cooldown (d921c09b)
• [CodeScanning #5] go/clear-text-logging in pkg/llmproxy/executor/antigravity_executor.go:216 #179: honor openai-compat models-endpoint overrides (a2571c90)

Documentation

• Added merge report: docs/planning/reports/issue-wave-gh-next32-merge-wave2-2026-02-23.md

Validation

• Focused tests passed for openai endpoint compatibility, registry context normalization, truncation detector, and openai models fetcher (executor + runtime variants).