fix: add mocha exit flag to prevent hanging tests

The mocha exit: true flag ensures mocha exits after tests complete,
even if there are unclosed connections or handles.

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Co-Authored-By: Claude <[email protected]>

Signed-off-by: Lars Trieloff <[email protected]>

Author: claude

package.json

@@ -27,6 +27,7 @@
     "recursive": "true",
     "reporter": "mocha-multi-reporters",
     "reporter-options": "configFile=.mocha-multi.json",
+    "exit": true,
     "exclude": [
       "test/fixtures/**"
     ]