NOTE: issue was reported in dqm-content-qicore-2025 repo:
https://github.com/cqframework/dqm-content-qicore-2025/issues/48 

Measure resource generated in MADiE export contains an invalid value for the following extension:
http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/cqfm-aggregateMethod

The extension (when the measure is exported from MADiE) incorrectly contains a valueString:
```
"extension": [

{   "url": "http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/cqfm-aggregateMethod",   "valueString": "Sum" }

```
Examples of this issue are found in the following measures:

The extension is expected contain a code from this ValueSet:
https://terminology.hl7.org/5.2.0/ValueSet-measure-aggregate-method.html 

```
"extension": [

{   "url": "http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/cqfm-aggregateMethod",   "valueCode": "sum" }

```