Notify on old adjustment service changes

Our NamespaceStatistics::AdjustmentService is responsible for correcting any inconsistencies in the vulnerability_namespace_statistics table data. This table is expected to remain up-to-date, and the service serves as a safety net to ensure that.

We should include an indication (log, event, something else) whenever the adjustment service actually makes changes and fixes records. This could signal a potential bug or an unhandled flow in our implementation that needs investigation.
Note that since the vulnerability_namespace_statistics updates take place in an async worker, we should expect some small changes.