fix(Global Tagging): add message field to TagResultsItem

[stefano-rm]

PR summary

Add optional message parameter to TagResultsItem class to expose detailed error messages returned by the GhoST Tags API when tagging operations fail.

PR Checklist

• The commit message follows the Angular Commit Message Guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Current vs new behavior

Current behavior: When a tagging operation fails, the TagResultsItem only contains resource_id and is_error fields. Error details are not exposed to SDK users.

New behavior: The TagResultsItem now includes an optional message parameter that contains the error message returned by the API, providing better error diagnostics.

Does this PR introduce a breaking change?

• Yes
• No

Other information

• Related to (IBM) task #29830
• Changes are minimal: adds the message parameter to __init__, docstrings, and from_dict method
• The parameter is optional and backward compatible
• Swagger definition has been updated and merged in the ghost-for-resources repository

[CLAassistant]

All committers have signed the CLA.

[mkrudele]

There are no unit tests added.

[pyrooka]

Changes look good, but please provide and evidence of a clean integration and examples test run.

[stefano-rm]

Changes look good, but please provide and evidence of a clean integration and examples test run.

[pyrooka]

LGTM!

[stefano-rm]

python3 -m pytest test/integration/test_global_tagging_v1.py
============================================== test session starts ==============================================
platform darwin -- Python 3.13.5, pytest-7.4.4, pluggy-1.6.0
rootdir: /Users/stefano/GhoST_repo/platform-services-python-sdk
plugins: mock-3.15.1, anyio-4.9.0, cov-4.1.0, langsmith-0.4.4
collected 11 items                                                                                              

test/integration/test_global_tagging_v1.py ...........                                                    [100%]

============================================== 11 passed in 17.21s ==============================================

[stefano-rm]

Examples Test

python3 -m pytest examples/test_global_tagging_v1_examples.py -v

============================= test session starts ==============================
platform darwin -- Python 3.13.5, pytest-7.4.4, pluggy-1.6.0 -- /Library/Frameworks/Python.framework/Versions/3.13/bin/python3
cachedir: .pytest_cache
rootdir: /Users/stefano/GhoST_repo/platform-services-python-sdk
plugins: mock-3.15.1, anyio-4.9.0, cov-4.1.0, langsmith-0.4.4
collecting ... collected 6 items

examples/test_global_tagging_v1_examples.py::TestGlobalTaggingV1Examples::test_create_tag_example PASSED [ 16%]
examples/test_global_tagging_v1_examples.py::TestGlobalTaggingV1Examples::test_list_tags_example PASSED [ 33%]
examples/test_global_tagging_v1_examples.py::TestGlobalTaggingV1Examples::test_attach_tag_example PASSED [ 50%]
examples/test_global_tagging_v1_examples.py::TestGlobalTaggingV1Examples::test_detach_tag_example PASSED [ 66%]
examples/test_global_tagging_v1_examples.py::TestGlobalTaggingV1Examples::test_delete_tag_example PASSED [ 83%]
examples/test_global_tagging_v1_examples.py::TestGlobalTaggingV1Examples::test_delete_tag_all_example PASSED [100%]

============================== 6 passed in 4.31s ===============================

[ibm-devx-sdk]

🎉 This PR is included in version 0.73.3 🎉

The release is available on GitHub release

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