🔒 Fix unhandled JSON.parse in Redux DevTools subscriber

[johnstrand]

🎯 What: The vulnerability fixed
An unhandled JSON.parse call in the Redux DevTools subscriber (src/Squawk.ts:134) could throw an exception if invalid JSON was received.

⚠️ Risk: The potential impact if left unfixed
If malformed JSON is emitted by the Redux DevTools extension, it would crash the application because the resulting SyntaxError would not be caught.

🛡️ Solution: How the fix addresses the vulnerability
Wrapped the JSON.parse call in a try...catch block. If the JSON is malformed, the error is caught and ignored, preventing an application crash and ensuring robust devtools integration. Added a unit test (src/__tests__/Squawk.redux.test.ts) to prevent regressions.

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PR created automatically by Jules for task 12257703584734440233 started by @johnstrand

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