How complete collection was, day by day over the last `days` days, per source: for the Meta Ad Library, brands collected and collected reliably (complete, no anomaly), queries expected, run and reliable, anomalies; with the known gaps and changes (outages, configuration changes) that suppress or explain a day.

How complete collection was, day by day over the last days days, per source: for the Meta Ad Library, brands collected and collected reliably (complete, no anomaly), queries expected, run and reliable, anomalies; with the known gaps and changes (outages, configuration changes) that suppress or explain a day. Scope system:read; cache hourly.