Map/UD - make sure User Dataset date variables have isTemporal annotation to work in Time series supporting plot.

[bobular]

Here are the variable annotations currently given to an all-ISO-8601 date column in a UD

	"8": {
		"id": "VAR_01ff10a196ec68be",
		"parentId": "VAR_e9c06705e76ee3f0",
		"providerLabel": "No Provider Label available",
		"displayName": "date",
		"definition": "",
		"displayType": "default",
		"type": "date",
		"hideFrom": [],
		"dataShape": "continuous",
		"distinctValuesCount": 1057,
		"isTemporal": false,
		"isFeatured": false,
		"isMergeKey": false,
		"isMultiValued": false,
		"imputeZero": false,
		"hasStudyDependentVocabulary": false,
		"distributionDefaults": {
			"rangeMin": "2022-01-01",
			"rangeMax": "2025-12-30",
			"binWidth": 1,
			"binUnits": "month"
		}
	}

These are the constraints defined by the back end:

https://github.com/VEuPathDB/service-eda/blob/42abe109e7a7d7343dff3bf9aea4b77262bd2239/src/main/java/org/veupathdb/service/eda/data/plugin/standalonemap/FloatingTimeSeriesPlugin.java#L26-L39

  public ConstraintSpec getConstraintSpec() {
    return new ConstraintSpec()
      .dependencyOrder(List.of("yAxisVariable"), List.of("xAxisVariable", "overlayVariable"))
      .pattern()
        .element("yAxisVariable")
          .description("Variable must be of the same or a child entity as the X-axis variable.")
        .element("xAxisVariable")
          .temporal(true)
          .description("Variable must be temporal and belong to the same or child entity as the variable the map markers are configured with, if any.")
        .element("overlayVariable")
          .required(false)
      .done();
  }
}

So the problem is that the UD date variable didn't get the isTemporal annotation.

I'll have a look to see where we can fix this.