refactor: workspace secrets-core + secrets-mcp MCP SaaS

- Split library (db/crypto/service) and MCP/Web/OAuth binary
- Add deploy examples and CI/docs updates

Made-with: Cursor

deploy/secrets-mcp.service

@@ -0,0 +1,27 @@
+[Unit]
+Description=Secrets MCP Server
+After=network.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=secrets-mcp
+Group=secrets-mcp
+WorkingDirectory=/opt/secrets-mcp
+EnvironmentFile=/opt/secrets-mcp/.env
+ExecStart=/opt/secrets-mcp/secrets-mcp
+Restart=always
+RestartSec=5
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=secrets-mcp
+
+# 安全加固
+NoNewPrivileges=yes
+ProtectSystem=strict
+ProtectHome=yes
+ReadWritePaths=/opt/secrets-mcp
+PrivateTmp=yes
+
+[Install]
+WantedBy=multi-user.target