fix: add axios to Docker builder dependencies for TypeScript compilation

- TypeScript needs axios to compile template-fetcher.ts
- Runtime doesn't need axios since templates are in pre-built database
- Maintains minimal runtime dependencies

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

package.runtime.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp-runtime",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "description": "n8n MCP Server Runtime Dependencies Only",
   "private": true,
   "dependencies": {