feat: add "recommended" tag to metadata dictionary fields (#3062)

[frano-m]

Summary

Closes #3062.

Show the existing grey "Recommended" chip on data dictionary rows that map to RequirementLabel.RECOMMENDED, consistent with the existing Required (red) and Strongly Recommended (orange) tags.

The accessor buildRequired in viewModelBuilders/dataDictionaryMapper/accessorFn.ts was already returning RequirementLabel.RECOMMENDED for non-required / non-strongly-recommended rows, and REQUIREMENT_LABEL_COLOR[RECOMMENDED] was already mapped to CHIP_PROPS.COLOR.DEFAULT (grey). Only the row.original.required && guard at fieldCell.tsx:72 was blocking the chip render — removed.

• components/DataDictionary/components/TableCell/components/FieldCell/fieldCell.tsx — drop the conditional, render the chip unconditionally.
• components/DataDictionary/components/TableCell/components/FieldCell/utils.ts — strip the now-stale "Only called when required is truthy" line from buildRequired's JSDoc.

Test plan

• Navigate to any metadata dictionary page. Confirm fields that previously had no chip now show a grey "Recommended" chip.
• Confirm Required (red) and Strongly Recommended (orange) chips still render as before.
• Visual: grey chip matches the colour weight of the existing red/orange chips (same variant=STATUS).

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