docs(progress): record response layer push failure

.learnings/ERRORS.md

@@ -2,6 +2,31 @@
 
 Command failures and integration errors.
 
+---
+## [ERR-20260920-041] gitea-cached-credential-rejected
+
+**Logged**: 2026-09-20
+**Priority**: medium
+**Status**: open
+**Area**: infra
+
+### Summary
+Gitea rejected the cached credential while pushing the verified response-layer commit.
+
+### Error
+`remote: Failed to authenticate user` and `fatal: Authentication failed`.
+
+### Context
+Local commit `89c20f3` was created successfully; no remote history changed. Earlier pushes to the same URL succeeded.
+
+### Suggested Fix
+Use the configured Git Credential Manager to refresh only the `git.jinome.org` credential, then push all pending commits and verify local/remote HEAD equality.
+
+### Metadata
+- Reproducible: not yet known
+- Related Files: `.git/config`, `Progression.md`
+- Pattern-Key: git.cached-credential-rejected
+
 ---
 ## [ERR-20260920-040] system-python-missing-project-package
 

Progression.md

@@ -786,7 +786,7 @@ Gate 0 当前判定：`passed`。四项交付物齐备；目标总体政策、
 - 可复现性：输出 SHA-256 为 `0260386444fd2d4a9b0183ef79b171b4fa47ab1d7c1706b05619c14cc8f8a197`；生成物由脚本重建，不纳入 Git 大文件历史。
 - 工程记录：首次误用系统 Python 导致 DuckDB 不可用，在读取数据前失败；切换到锁定的 `.venv-research` 后完成，记录为已解决 `ERR-20260920-040`。
 - 质量边界：结构校验通过不等于条目内容双审或抽样设计批准。所有题目仍为 `provisional`，Gate 1 保持 `in_progress`。
-- 推送状态：`push_pending`；完成差异检查、提交和远端推送后更新。
+- 推送状态：`push_failed`；本地研究提交 `89c20f3` 已创建，但远端拒绝当前缓存凭据（`Failed to authenticate user`）。重新授权成功前不得声称已上传。
 - 下一步：逐调查核验权重、PSU、stratum 和方差方法的官方来源；随后落实两名实际审核者签署。
 
 ## 9. 剩余工作量估算（2026-09-20 基线）