Prometheus integration

[PTKu]

This pull request introduces several improvements and fixes across the codebase, focusing on data object consistency, logging robustness, caching optimizations, and MongoDB repository enhancements. The most significant changes include the addition of timestamp fields to data objects, safer handling of identity information in logging, caching for message counts to improve performance, and improved configurability for MongoDB repositories.

Data Object Consistency and Timestamping

• Added ModifiedAt and CreatedAt properties to the IBrowsableDataObject interface and implemented them in related classes (PersistentRecord, AxoDataEntity, and IAxoDataEntity) for better tracking of entity creation and modification times. [1] [2] [3] [4]
• Ensured ModifiedAt is updated to the current UTC time during Create and Update operations in RepositoryBase. [1] [2]

Logging Robustness

• Improved logging methods in SerilogLogger by adding null checks for identity properties, preventing potential null reference exceptions.

Caching and Performance Improvements

• Implemented caching for active and relevant message counts in AxoMessageProvider to reduce flickering and improve performance, with cache invalidation support after batch reads. [1] [2]

MongoDB Repository Enhancements

• Exposed repository settings via a public property in MongoDbRepository, and made the collection name accessible and consistent through MongoDbRepositorySettings. [1] [2] [3] [4] [5]
• Removed unnecessary package reference to MongoDB.Driver.Core for cleaner project dependencies.

Miscellaneous Fixes

• Reset message count upon initialization in AxoObject to ensure correct state. [1] [2] [3]
• Updated observer initialization method in AxoObjectSpotView.razor for improved polling behavior.
• Minor code organization and documentation improvements. [1] [2]

Let me know if you'd like deeper details on any of these changes!