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e56b95daec
Refactor the telemetry function and format to include stats broken down on common relation types. The types include: - Tables - Partitioned tables - Hypertables - Distributed hypertables - Continuous aggregates - Materialized views - Views and for each of these types report (when applicable): - Total number of relations - Total number of children/chunks - Total data volume (broken into heap, toast, and indexes). - Compression stats - PG stats, like reltuples The telemetry function has also been refactored to return `jsonb` instead of `text`. This makes it easier to query and manipulate the resulting JSON format, and also gives cleaner output. Closes #3932