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This PCRE regex is designed to parse log lines or text summaries that report endpoint monitoring statistics. It captures the number of active, loading, failed, and total endpoints into named capture groups (`NumActive`, `NumLoading`, `NumFailed`, `NumTotal`), while also matching other static numbers like loaded and idle counts. It is ideal for extracting specific metrics from application logs or monitoring tools that format output in a "behavior: X active, Y loading..." structure.