init: RAG 知识库服务初始提交

- 后端 API（Flask + Gunicorn）
- RAG 引擎（混合检索 + 云端 Reranker + 引用溯源）
- 文档解析（MinerU + 多格式支持）
- Docker 生产部署配置
- 排除前端项目、敏感配置、模型文件

.understand-anything/.understandignore

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+# .understandignore — patterns for files/dirs to exclude from analysis
+# Syntax: same as .gitignore (globs, # comments, ! negation, trailing / for dirs)
+# Lines below are suggestions — uncomment to activate.
+# Use ! prefix to force-include something excluded by defaults.
+#
+# Built-in defaults (always excluded unless negated):
+#   node_modules/, .git/, dist/, build/, obj/, *.lock, *.min.js, etc.
+#
+# --- From .gitignore (uncomment to exclude) ---
+
+# config.py
+# .env
+# .env.local
+# .env.*.local
+# mineru.json
+# .env.mineru
+# mineru.json
+# models/
+# bge-base-zh-v1.5/
+# chroma_db/
+# bm25_index.pkl
+# .env/
+# *.py[cod]
+# *$py.class
+# *.so
+# *.swp
+# *.swo
+# .DS_Store
+# Thumbs.db
+# *.tmp
+# *.temp
+# ~$*.xlsx
+# .claude/
+# CLAUDE.md
+# sessions.db
+# tests/
+# documents/
+# 批阅报告/
+# 题库/
+# analysis_reports/
+# exported_chunks/
+# exported_chunks_v2/
+# exported_chunks_v3/
+# test_output/
+# docs/superpowers/
+# data/
+# vector_store/
+# knowledge/vector_store/
+# .data/
+# exam_questions.json
+# exam_stored.json
+# grade_result.json
+# llm_response.json
+# student_answers.json
+# test_optimized.json
+# test_result.json
+# tools/
+# dev-ui/dist/
+# =2.11.7
+# docs/安装提示
+# docs/题目模板
+# docs/后续优化
+# rag流水线日志*.txt
+# docs/切片接口字段过滤示例.txt
+# docs/环境分离说明.md
+# scripts/evaluate_enum_context.py
+# scripts/migrate_split_databases.py
+# UPLOAD_CHECKLIST.md
+
+# --- Detected directories (uncomment to exclude) ---
+
+# tests/
+# docs/
+# scripts/
+
+# --- Test file patterns (uncomment to exclude) ---
+
+# *.test.*
+# *.spec.*
+# *.snap

.understand-anything/meta.json

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+{
+  "lastAnalyzedAt": "2026-05-26T13:10:00.000Z",
+  "gitCommitHash": "8c95336539b1070e8ad6d12e44783a2fd6b722cb",
+  "version": "1.0.0",
+  "analyzedFiles": 172
+}