初始化：记忆系统源代码上传（已脱敏）

- 排除 .env / *.bak / 内部运维文档（README_INTERNAL.html）
- config.py 默认密码已替换为占位符 CHANGE_ME_*
- init_db.sql 移除生产数据库用户 GRANT 段
- README.html 数据库用户名已脱敏
- 保留：源码 + 公网 API 文档 + 建表 SQL（无授权语句）

config.py

@@ -0,0 +1,51 @@
+"""Memory System Configuration"""
+import os
+import json
+
+
+class Config:
+    # MySQL
+    MYSQL_HOST = os.getenv("MYSQL_HOST", "127.0.0.1")
+    MYSQL_PORT = int(os.getenv("MYSQL_PORT", "3306"))
+    MYSQL_USER = os.getenv("MYSQL_USER", "your_db_user")
+    MYSQL_PASSWORD = os.getenv("MYSQL_PASSWORD", "CHANGE_ME_MYSQL_PASSWORD")
+    MYSQL_DATABASE = os.getenv("MYSQL_DATABASE", "memory_system")
+    MYSQL_CHARSET = "utf8mb4"
+    MYSQL_UNIX_SOCKET = os.getenv("MYSQL_UNIX_SOCKET", "/var/run/mysqld/mysqld.sock")
+
+    # Redis
+    REDIS_HOST = os.getenv("REDIS_HOST", "127.0.0.1")
+    REDIS_PORT = int(os.getenv("REDIS_PORT", "6379"))
+    REDIS_PASSWORD = os.getenv("REDIS_PASSWORD", "CHANGE_ME_REDIS_PASSWORD")
+    REDIS_DB = int(os.getenv("REDIS_DB", "0"))
+
+    # BGE Embedding Service
+    EMBEDDING_SERVICE_URL = os.getenv("EMBEDDING_SERVICE_URL", "http://127.0.0.1:8080")
+    EMBEDDING_DIM = 512
+
+    # Working memory TTL (seconds)
+    WORKING_MEMORY_TTL = int(os.getenv("WORKING_MEMORY_TTL", "259200"))  # 72h
+
+    # Cleanup defaults
+    CLEANUP_MAX_AGE_DAYS = 90
+    CLEANUP_MIN_IMPORTANCE = 0.2
+
+    # API
+    API_HOST = os.getenv("API_HOST", "127.0.0.1")
+    API_PORT = int(os.getenv("API_PORT", "8081"))
+
+    # LLM providers (JSON list, priority=1 is primary, higher = fallback)
+    LLM_PROVIDERS_JSON = os.getenv("LLM_PROVIDERS", "[]")
+
+    @property
+    def llm_providers(self) -> list:
+        try:
+            val = self.LLM_PROVIDERS_JSON
+            providers = json.loads(val) if val else []
+            for p in providers:
+                key = p.get("api_key", "")
+                if isinstance(key, str) and key.startswith("${") and key.endswith("}"):
+                    p["api_key"] = os.getenv(key[2:-1], "") or ""
+            return providers
+        except (json.JSONDecodeError, TypeError):
+            return []