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

scripts/check_tables.py

@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+"""检查 MinerU 输出中表格的实际内容"""
+import json
+import os
+import sys
+
+sys.stdout.reconfigure(encoding='utf-8')
+
+BASE = r"c:\Users\qq318\Desktop\rag-agent\.data\mineru_output"
+
+# hash -> 文件名映射
+hash_map = {}
+for h in os.listdir(BASE):
+    subdir = os.path.join(BASE, h)
+    for name in os.listdir(subdir):
+        hash_map[h] = name
+
+print("=" * 60)
+print("MinerU 表格内容分析")
+print("=" * 60)
+
+for file_hash, doc_name in hash_map.items():
+    # 查找 content_list
+    for subpath in ["office", "auto"]:
+        cl_path = os.path.join(BASE, file_hash, doc_name, subpath, f"{doc_name}_content_list.json")
+        if os.path.exists(cl_path):
+            break
+    else:
+        print(f"\n{doc_name}: content_list not found")
+        continue
+
+    with open(cl_path, 'r', encoding='utf-8') as f:
+        content_list = json.load(f)
+
+    tables = [(i, item) for i, item in enumerate(content_list) if item.get('type') == 'table']
+    
+    if not tables:
+        continue
+
+    print(f"\n--- {doc_name} ({len(tables)} tables) ---")
+    
+    no_caption = 0
+    no_body = 0
+    
+    for idx, item in tables:
+        caption = item.get('table_caption', '')
+        if isinstance(caption, list):
+            caption = ' '.join(str(c) for c in caption)
+        body = item.get('table_body', '')
+        if isinstance(body, list):
+            body = ' '.join(str(b) for b in body)
+        page = item.get('page_idx', '?')
+        
+        has_caption = bool(caption and str(caption).strip() and str(caption).strip() != '表格')
+        has_body = bool(body and str(body).strip())
+        
+        if not has_caption:
+            no_caption += 1
+        if not has_body:
+            no_body += 1
+        
+        # 只打印前5个无caption的
+        if not has_caption and no_caption <= 5:
+            body_preview = body[:120].replace('\n', '\\n') if body else '(empty)'
+            print(f"  [idx={idx}, page={page}] caption={repr(caption)[:40]}")
+            print(f"    body: {body_preview}")
+    
+    print(f"  总表格数: {len(tables)}")
+    print(f"  无caption: {no_caption}")
+    print(f"  无body: {no_body}")
+    print(f"  有caption有body: {len(tables) - max(no_caption, no_body)}")