- Moved RateLimitMetrics import path to a more centralized location.
- Introduced a new file for active sessions gauge to track user sessions in the database.
- Updated index.ts to include new metrics and ensure proper initialization of observability metrics.
- Modified various routes and services to utilize the new observability structure.
- Added smoke tests for HTTP and WebSocket metrics to ensure proper metric registration and functionality.
- Enhanced error handling for metrics reading failures to improve observability.
- Updated the EngagementMetrics interface to use ObservableGauge for tracking active WebSocket connections.
- Added detailed comments explaining the rationale for this change, highlighting the benefits of using a pull-based gauge over a delta-based counter.
- Implemented the ObservableGauge in the createChatWsHandlers function, ensuring it accurately reflects the live count of active connections.
- Removed the previous UpDownCounter logic to prevent issues with connection drift during process crashes or network interruptions.
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