[GET] TimeSeries Group does not upper-case Office ID

Describe the bug
If a user calls the timeseries group endpoint to retrieve a specific timeseries group the office argument will not be uppercased.

If you leave it lowercase it will fail to find any timeseries in the requested group. Suggest we uppercase to avoid the user having to uppercase/client-libraries having to know to do this.

Expected behavior
User can enter SwT, swt, SWT, or any variation of and it result in a timeseries found so long as the letters match the office.

To Reproduce
Steps to reproduce the behavior:

Fails

curl -X 'GET' \
  'https://cwms-data.usace.army.mil/cwms-data/timeseries/group/Test-monthlychartsgroup2?office=swt&category-office-id=SWT&group-office-id=SWT&category-id=Test-monthlycharts2' \
  -H 'accept: application/json'

yields

...start
"assigned-time-series": []

Works

curl -X 'GET' \
  'https://cwms-data.usace.army.mil/cwms-data/timeseries/group/Test-monthlychartsgroup2?office=SWT&category-office-id=SWT&group-office-id=SWT&category-id=Test-monthlycharts2' \
  -H 'accept: application/json'

yields

...start
"assigned-time-series": [
    {
      "office-id": "SWT",
      "timeseries-id": "AARK.%-Regulating Flow.Inst.1Hour.0.Ccp-Rev"
    },
    {
      "office-id": "SWT",
      "timeseries-id": "AARK.Dir-Wind.Inst.1Hour.0.Ccp-Rev"
    }
  ]

CDA Version (please complete the following information):

• Version 2025.09.02

Start by tracing the GET /cwms-data/timeseries/group endpoint and how its office query parameter is handled. Reproduce the provided curl request with lowercase and mixed-case office values, then verify that matching requests return the assigned time series for the office.