feat(ECR-012–016): 合规、题库、时辰刷新、头像、MBTI OEJTS 与埋点

落地输入合规、探索题库、报告日/时辰刷新、账号头像、OEJTS 量表，并补齐 H5 埋点与 Admin 漏斗；同步 ESS 工件、切至自建 Git、清理 GitHub Actions。

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/HANDOFF/ECR-015-engineer-to-reviewer.md

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+# HANDOFF — ECR-015 Engineer → Reviewer
+
+**From:** Engineer  
+**To:** Reviewer  
+**Date:** 2026-08-13  
+**ECR:** ECR-015  
+**Retrospective:** true  
+
+## Delivered
+
+- 核对 Spec R9 接线（migration / auth / media / H5 / SDK）  
+- 新增 `internal/avatar/store_test.go`（穿越 · 类型 · 大小 · 覆盖写）  
+- OpenAPI 补错误码与路径约束说明  
+- TEST_REPORT  
+
+## Verify
+
+```bash
+export ESS_ROOT=/Users/jack/Project/skills/engineering-spec-system
+cd apps/api && go test ./internal/avatar/ -count=1
+cd ../.. && python scripts/ess-validate.py --phase coding --ecr ECR-015
+```
+
+## Owner next
+
+`STATE.owner = reviewer`