Overview

Add operation counter metric names for the Query Integration team to the OpenTelemetry metric registry in metric_names.h.

Scope of Work

• src/mongo/otel/metrics/metric_names.h — Add MetricNames entries for insert, query, update, delete, getMore, command, and aggregate operation counters

Technical Notes

• The new metric names follow OTel naming conventions: pluralized, snake_case, under the opcounters.* namespace
• The aggregate metric name is OTel-native; it does not correspond to an existing serverStatus field
• Metrics for nestedAggregate, insertOnExistingDoc, and other niche counters are intentionally excluded from OTel for now