Bump @modelcontextprotocol/sdk to ^1.23.0

Update SDK dependency to fix CI build failures caused by version
mismatch. CI was installing 1.23.0 (latest compatible with ^1.22.0)
while local builds used 1.22.0.

Note: package-lock.json is gitignored, which prevents reproducible
builds. Consider committing it to ensure CI uses the same versions
as local development.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: jonathanhefner

package.json

@@ -51,7 +51,7 @@
     "typescript": "^5.9.3"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.22.0",
+    "@modelcontextprotocol/sdk": "^1.23.0",
     "bun": "^1.3.2",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",