Fix SSE route dependency and align architecture docs

.env.example

@@ -9,15 +9,15 @@ DEBUG=false
 # ===== Milvus向量数据库配置 =====
 MILVUS_HOST=localhost
 MILVUS_PORT=19530
-MILVUS_COLLECTION=regulations
+MILVUS_COLLECTION=regulations_dense_1536
 MILVUS_DB_NAME=default
 
 # ===== 嵌入模型配置 =====
-EMBEDDING_MODEL=BAAI/bge-m3
-EMBEDDING_DIM=1024
-EMBEDDING_MAX_LENGTH=8192
-EMBEDDING_BATCH_SIZE=12
-EMBEDDING_USE_FP16=true
+EMBEDDING_MODEL=text-embedding-v3
+EMBEDDING_DIM=1536
+EMBEDDING_API_KEY=your_embedding_api_key_here
+EMBEDDING_BASE_URL=http://6.86.80.4:30080/v1
+EMBEDDING_TIMEOUT_SECONDS=120
 
 # ===== MinIO对象存储配置 =====
 MINIO_ENDPOINT=localhost:9000
@@ -43,6 +43,12 @@ POSTGRES_DB=compliance_db
 CHUNK_SIZE=512
 CHUNK_OVERLAP=50
 MAX_FILE_SIZE_MB=100
+DOCUMENT_METADATA_PATH=backend/data/documents.json
+
+# ===== 阿里云文档解析 =====
+ALIBABA_ACCESS_KEY_ID=your_aliyun_access_key_id
+ALIBABA_ACCESS_KEY_SECRET=your_aliyun_access_key_secret
+ALIBABA_ENDPOINT=docmind-api.cn-hangzhou.aliyuncs.com
 
 # ===== API服务配置 =====
 API_HOST=0.0.0.0
@@ -75,4 +81,7 @@ DEEPSEEK_MODEL=deepseek-v4-flash
 RAG_TOP_K=10
 RAG_MAX_CONTEXT_TOKENS=4000
 RAG_SUMMARY_MAX_TOKENS=1024
-RAG_SKILLS_MAX_TOKENS=2048
+
+# ===== 会话配置 =====
+SESSION_MAX_SESSIONS=100
+SESSION_TIMEOUT_MINUTES=30