Fix alerting sequence

[seanankenbruck]

This PR resolves a few bugs discovered during integration testing:

• Notification channels are now properly registered in the DI Container for AlertingEngine
• Created README.md in AlertingEngine project to show how to set notification channel secrets
• Added JSON serialization fixes for case mismatch and converting condition operator to the proper AlertRule Comparison operator enum
• Added logging throughout alert and notification flow
• Fixed ShouldNotify logic to ensure this bool evaluates the conditions properly

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