Bump version to 1.6.0 and update @modelcontextprotocol/sdk to 1.12.1; add guards to SSE endpoint

Author: rinormaloku

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@rekog/mcp-nest",
-  "version": "1.6.0-beta.0",
+  "version": "1.6.0",
   "description": "NestJS module for creating Model Context Protocol (MCP) servers",
   "main": "dist/index.js",
   "license": "MIT",
@@ -39,7 +39,7 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",
     "@eslint/js": "^9.18.0",
-    "@modelcontextprotocol/sdk": "^1.12.0",
+    "@modelcontextprotocol/sdk": "^1.12.1",
     "@nestjs/common": "^11.1.1",
     "@nestjs/core": "^11.1.1",
     "@nestjs/platform-express": "^11.1.1",

package.json

@@ -73,6 +73,7 @@ export function createSseController(
      * SSE connection endpoint
      */
     @Get(sseEndpoint)
+    @UseGuards(...guards)
     async sse(@Res() res: Response) {
       const transport = new SSEServerTransport(
         normalizeEndpoint(