chore(deps): update dependency eventsource to v4

Author: renovate[bot]

package.json

@@ -132,7 +132,7 @@
     "eslint-config-prettier": "10.1.5",
     "eslint-plugin-import": "2.31.0",
     "eslint-plugin-prettier": "5.4.0",
-    "eventsource": "3.0.7",
+    "eventsource": "4.0.0",
     "fancy-log": "2.0.0",
     "fastify": "5.3.3",
     "globals": "16.1.0",