Gracefully handle missing CDA account/profile

[jbkolze]

Currently the API fails without sufficient user feedback if a user is logged in through Keycloak but does not have a CWMS account. This should theoretically not occur once automatic CWMS account creation via keycloak is enabled in all environments, but ideally some manner of feedback would be provided as a failsafe.

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File "/code/cwms_batch_events/core/auth/user/dependencies.py", line 32, in get_current_user_keycloak
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cda_user = get_user_profile(token)
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File "/code/cwms_batch_events/core/auth/user/roles.py", line 15, in get_user_profile
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profile = CdaUserProfile(**response.json())
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File "/usr/local/lib/python3.13/site-packages/pydantic/main.py", line 250, in __init__
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validated_self = self.__pydantic_validator__.validate_python(data, self_instance=self)
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pydantic_core._pydantic_core.ValidationError: 4 validation errors for CdaUserProfile
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user-name
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Field required [type=missing, input_value={'message': 'Invalid User...t error', 'details': {}}, input_type=dict]
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For further information visit https://errors.pydantic.dev/2.12/v/missing
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principal
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Field required [type=missing, input_value={'message': 'Invalid User...t error', 'details': {}}, input_type=dict]
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For further information visit https://errors.pydantic.dev/2.12/v/missing
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cac-auth
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Field required [type=missing, input_value={'message': 'Invalid User...t error', 'details': {}}, input_type=dict]
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For further information visit https://errors.pydantic.dev/2.12/v/missing
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roles
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Field required [type=missing, input_value={'message': 'Invalid User...t error', 'details': {}}, input_type=dict]
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For further information visit https://errors.pydantic.dev/2.12/v/missing