[DQ Threshold W1.3] UI — threshold control, enum sentences, and live preview in the test form

[TeddyCr]

Replace the raw-symbol dropdowns with sentences and add the threshold control.

The lever — no schema change

A SELECT's react-hook-form value is a FormSelectItem ({ id, label }). The id stays the raw enum the backend stores; the label is free to be a translated sentence. Stored values never change, so there is no migration and existing test cases pick up the new wording automatically.

Enum → sentence mapping

operator (tableCustomSQLQuery only) completing "The query should return …":

id	label	reads as
<=	at most	…at most 10 rows.
<	fewer than	…fewer than 10 rows.
>=	at least	…at least 1 row.
>	more than	…more than 1 row.
==	exactly	…exactly 0 rows.
!=	anything other than	…anything other than 0 rows.

"at most" (inclusive) vs "fewer than" (strict) carries the <=/< distinction — unambiguous in English, which the symbols are not.

thresholdUnit — the label is contextual, so resolve from (unit, testDefinitionName), not a flat map:

id	row-countable	statistical	tableCustomSQLQuery
ABSOLUTE	rows	units	rows
PERCENTAGE	% of rows / % of non-null values	% of the bound	% of table rows

strategy (same form, same defect): ROWS → count the rows the query returns; COUNT → use the single number the query returns.
dimensionFailurePolicy: OVERALL_ONLY → only the overall result decides; ANY_DIMENSION → any breaching group fails the test.

Live preview sentence

Fail when more than 1% of the non-null values in email do not match the pattern.
Fail when more than 50 rows are null — measured on the 10% sample this table is profiled with.
Fail when the mean of amount falls outside 90–110, allowing a 5% deviation (85.5–115.5).

For statistical tests show the computed effective range — it is the number users reason about, and it makes the zero-bound degenerate case visible immediately.

Files

• components/DataQuality/AddDataQualityTest/components/ParameterFields.tsx — labels, group threshold + unit into one row
• utils/ParameterForm/ParameterFieldsUtils.ts — thresholdUnit is a new optionValues param; confirm isSelectParam and the prefill classifier cover it (the FormSelectItem prefill trap is called out in that file's own comment)
• components/DataQuality/AddDataQualityTest/components/TestCaseFormBody.tsx — preview, sampling warning, zero-bound warning
• src/locale/languages/en-us.json + yarn i18n — translate the placeholders, per .claude/rules/i18n.md

ParameterForm.tsx (legacy Ant) is not in scope. New UI uses @openmetadata/ui-core-components.

Acceptance

• Every enum renders its sentence label and still submits its raw id
• thresholdUnit resolves the right noun per test class
• thresholdUnit prefills correctly in edit mode
• Preview correct for each semantic × unit combination, including the effective range

Depends on #33227.

Design spec: docs/plans/2026-09-11-dq-failure-thresholds.md. Parent epic: #16301.