chore(v2): 从兴邦预审v2白名单抽取独立可运行基座

按 docs/v2/05-implementation-plan.md §1 候选迁移表与 claude_use/T00 白名单，
从 55e2cdb 抽取 224 个文件（2.48 MB）到独立目录 F:/mini-OpenClaw-v2。

- 排除：凭据(.env/server-deploy.conf/旧DELIVERY.md)、运行数据(xingbang_data 等
  4 个 SQLite)、依赖(venv/node_modules 符号链接)、归档(_backup*/test-evidence/
  ori_file)、Office 临时文件
- 目标目录独立 git 仓库，初始恢复点；Gitea 远程与分支待 OQ-06 Q2 定案
- 未部署、未启动服务、未调用模型

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

backend/requirements.txt

@@ -0,0 +1,34 @@
+fastapi>=0.110.0
+uvicorn[standard]>=0.27.0
+sse-starlette>=2.0.0
+python-dotenv>=1.0.0
+pydantic>=2.0.0
+
+# LangChain
+langchain>=1.0.0
+langchain-openai>=0.3.0
+langchain-deepseek>=0.1.0
+langchain-community>=0.3.0
+langchain-experimental>=0.3.0
+langgraph>=1.0.0
+
+# LlamaIndex
+llama-index-core>=0.12.0
+llama-index-embeddings-openai>=0.3.0
+llama-index-retrievers-bm25>=0.4.0
+
+# Token counting
+tiktoken>=0.7.0
+
+# Tools
+html2text>=2024.2.26
+beautifulsoup4>=4.12.0
+requests>=2.31.0
+pyyaml>=6.0.0
+SQLAlchemy>=2.0.0
+sqlglot>=26.0.0
+psycopg[binary]>=3.2.0
+PyMySQL>=1.1.0
+python-docx>=1.1.0
+PyMuPDF>=1.24.0
+python-multipart>=0.0.9