Roll up integration-elonsg into dev

[ElonSG]

Summary

Rolls 3 commits from integration-elonsg into dev for ChronoAIProject/fkst-substrate, through immutable head 0aa51b1ff3f27b94c0b837c90ec8d09f1a01f326.

• Adds regression coverage for the successful local iteration path.
• Verifies a zero-status cargo gate exits successfully and emits exactly one FKST_LOCAL_ITERATION_RESULT:v2:PASS:NONE marker.
• Includes merged PR github-devloop implementation for #362 #363 for issue the success path emits PASS:NONE but no test asserts it — the only verdict a green implementation produces is uncovered #362.
• Reported pre-merge CI and post-merge probe results: pass.

中文摘要

本次汇总包含 3 个提交，新增本地迭代成功路径的回归测试：验证 cargo gate 在状态为零时成功退出，并且仅输出一次精确的 PASS:NONE 结果标记。PR #363 已合并；记录中的合并前 CI 与合并后探测均为通过。
⟦AI:FKST⟧

[ElonSG]

github-devloop-integration rollup observe sample

status=clean
reason=clean
head_sha=0aa51b1ff3f27b94c0b837c90ec8d09f1a01f326
first_clean_observed_at_ms=1786303449800
sampled_at_ms=1786305532363