🐛 fixes failure due to nullable doi in licensed-items web-api response

[pcrespov]

What do these changes do?

Fixes validation error in master deploy

  File "/home/scu/.venv/lib/python3.11/site-packages/pydantic/main.py", line 627, in model_validate
    return cls.__pydantic_validator__.validate_python(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for LicensedItemRestGet
licensed_resource_data.source.doi
  Input should be a valid string [type=string_type, input_value=None, input_type=NoneType]
    For further information visit https://errors.pydantic.dev/2.10/v/string_type

Related issue/s

• master deploy error reported by @odeimaiz

How to test

cd packages/models-library
make install-dev
pytest -vv tests/test_licenses

Dev-ops

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.46%. Comparing base (4653f36) to head (7407dd8).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7177      +/-   ##
==========================================
- Coverage   87.66%   87.46%   -0.20%     
==========================================
  Files        1641     1318     -323     
  Lines       64171    54965    -9206     
  Branches     1179      570     -609     
==========================================
- Hits        56253    48073    -8180     
+ Misses       7607     6763     -844     
+ Partials      311      129     -182     

Flag	Coverage Δ
integrationtests	77.54% <ø> (+12.95%)	⬆️
unittests	86.85% <100.00%> (+0.90%)	⬆️

Components	Coverage Δ
api	∅ <ø> (∅)
pkg_aws_library	∅ <ø> (∅)
pkg_dask_task_models_library	∅ <ø> (∅)
pkg_models_library	91.45% <100.00%> (+0.02%)	⬆️
pkg_notifications_library	∅ <ø> (∅)
pkg_postgres_database	∅ <ø> (∅)
pkg_service_integration	70.03% <ø> (ø)
pkg_service_library	∅ <ø> (∅)
pkg_settings_library	∅ <ø> (∅)
pkg_simcore_sdk	85.50% <ø> (ø)
agent	96.46% <ø> (ø)
api_server	90.55% <ø> (ø)
autoscaling	96.08% <ø> (ø)
catalog	90.33% <ø> (ø)
clusters_keeper	99.24% <ø> (ø)
dask_sidecar	91.26% <ø> (ø)
datcore_adapter	93.19% <ø> (ø)
director	76.92% <ø> (ø)
director_v2	84.47% <ø> (-6.82%)	⬇️
dynamic_scheduler	97.17% <ø> (ø)
dynamic_sidecar	88.84% <ø> (-0.92%)	⬇️
efs_guardian	90.25% <ø> (ø)
invitations	93.28% <ø> (ø)
osparc_gateway_server	∅ <ø> (∅)
payments	92.66% <ø> (ø)
resource_usage_tracker	89.01% <ø> (+0.05%)	⬆️
storage	89.57% <ø> (ø)
webclient	∅ <ø> (∅)
webserver	84.90% <ø> (-1.32%)	⬇️

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