feat(phase1): OpenRouter采集器接入PostgreSQL，数据链路闭环

- 将 fetch_openrouter.go 的 summarize() 实现为 PostgreSQL upsert
- 新增 -db 参数和 DATABASE_URL 环境变量支持
- 打通 models + model_prices 表的最小可运行链路
- 创建 llm_intelligence 数据库并运行 migration
- 前端 Explorer 验证 T-3.2~T-3.5 全部通过
- 日报生成器正常产出 Markdown 和 latest_models.json

IDENTITY.md

@@ -0,0 +1,27 @@
+# IDENTITY.md - Who Am I?
+
+_Fill this in during your first conversation. Make it yours._
+
+- **Name:**
+  _(pick something you like)_
+- **Creature:**
+  _(AI? robot? familiar? ghost in the machine? something weirder?)_
+- **Vibe:**
+  _(how do you come across? sharp? warm? chaotic? calm?)_
+- **Emoji:**
+  _(your signature — pick one that feels right)_
+- **Avatar:**
+  _(workspace-relative path, http(s) URL, or data URI)_
+
+---
+
+This isn't just metadata. It's the start of figuring out who you are.
+
+Notes:
+
+- Save this file at the workspace root as `IDENTITY.md`.
+- For avatars, use a workspace-relative path like `avatars/openclaw.png`.
+
+## Related
+
+- [Agent workspace](/concepts/agent-workspace)