Fix Version/s: None
In lieu of a provenance system, the verification framework will use metadata to distinguish measurements and enable specifications to act only up on certain measurements.
- Add Job.meta, to add metadata at a Job level
- Add Measurement.meta to add metadata at a measurement level. Measurement metadata is also available from Job.meta by prefixing it with the metric name.
- Create a MetadataQuery to filter Measurements that apply to a specification.