Provide aggregation support for contingency table count for probabilistic forecast line type PCT

[michelleharrold]

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The PCT line type from point-stat and grid-stat requires support for aggregation. The DTC RRFS T&E team would like to create reliability diagrams and Brier Score plots on the command line, aggregating over multiple initializations.

The work to reformat the PCT line type has already been completed in METdataio.

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Issues should represent approximately 1 to 3 days of work.

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Relevant Deadlines

End of the period of performance is 4 May 2025, but ideally we would have the functionality in the next 1-2 months in order to test and exercise.

Funding Source

FY2024 NOAA Base (2783534)

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