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Replace the per-index get_pool_status/3 loop (1..count) with a single ordered_set prefix scan via match_object. This eliminates the need for Supervisor.count_children calls in the get_pool_status path, reducing it to a direct ETS lookup keyed by pool name.
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Somewhat a follow up on #362, having the pid on the metrics could help me correlate load to processes. Also, reworked the implementation to use
ordered_setets tables, which allow to use prefix lookups, hence skipping a supervisor call and replacecount-ets-lookups with a single one.