ldms-notify enhancements needed for production convenience. #1338
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While not always calculable, the duration of tracked pids is of great interest and rather hard to compute downstream. This adds the duration field to process end messages and a format option to suppress it for sites not ready to migrate to the expanded schema.
Unlike ldmsd, the status of ldms-notify cannot be determined remotely, so this also adds a heartbeat message, which by default is not generated.