🧪 Add tests for GET /api/logs endpoint

[Trapston3]

🎯 What: Added missing tests for the GET /api/logs endpoint in src/server.js:195. The gap was addressed by introducing the supertest HTTP client.
📊 Coverage: Covered scenarios include:

• Verify that initial state reflects precisely one log (the DELETE request from beforeEach hook clearing the logs).
• Verify that valid requests (like GET /health) populate the log buffer correctly, and that GET /api/logs successfully retrieves the updated buffer, preserving request metadata.
  ✨ Result: Enhanced test suite coverage ensuring stability and correctness of log buffer retrieval functionality.

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PR created automatically by Jules for task 7957155098162808164 started by @Trapston3

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