* Refactor: Convert app and cluster info metrics from counters to gauges
- Change app_info, app_status_recovery_mode, and cluster_enabled metrics from COUNTER to GAUGE
- Update metric values to use boolean as f64 for consistency and clarity
- Improve metric type accuracy for better representation of state information
* fix: Update docs regarding metrics type
* openapi: Update app_info metric type
* metrics: Update test to check for the right metric type