Documents: Program Segment Justification Improvements

Improvements requested by PGE during UAT for: https://cpuccedars.featurebase.app/p/add-new-report-type-program-segment-justification-and-equity-market

• Limit the user to select only their respective PA (single PA) with a single-year selection.

• Clarification is needed from CPUC. Does this feature need to extend beyond the single PA/year selection, and if so, why?