chore: quantlab-agent 프로젝트 초기 설정

agent_guide 템플릿 기반으로 프로젝트 구조 설정.
Gitea(quantlab-agent), Vikunja(project #15) 연동 완료.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/codebase/INTEGRATIONS.md

@@ -0,0 +1,17 @@
+# Codebase Integrations (`INTEGRATIONS.md`)
+
+## Webhooks & APIs
+- Currently, this project relies purely on Git synchronisation and CLI execution. Network activity is limited to downloading external packages (`npm install`, `pip install`, `git clone/pull`).
+- Once MCP tools are invoked, `claude-mem` likely interacts with SQLite logic or LLM memory endpoints depending on its runtime schema. `browser-use` interfaces with web targets directly.
+
+## Databases & Persistence
+- There are no central RDBMS or NoSQL layers native to this orchestration layer.
+- **Knowledge/Memory**: The project serves as an SSOT using markdown (`.planning/*`, `.agent/knowledge/*`).
+- **MCP state persistence**: Relies on specific plugin's local DBs (e.g., SQLite for mem logs).
+
+## Third-Party Authentication
+- Configured by `.agent/config/.env.agent` which includes API keys (Vikunja Task ID, Gitea instances, etc.), though the current codebase only seeds and checks for its existence without directly invoking the APIs inside the shell scripts.
+
+## Core External Tools
+- **Git**: Primary persistence and vendor orchestration transport mechanism.
+- **NPM & PIP**: Invoked asynchronously by bootstrap scripts to satisfy AI tool dependencies.