More use of base64 to improve test stability.

[jmchilton]

I think each usage we catch should improve the reliability of all the tests that still hit Github since we're less likely to hit rate limits and such.

xref https://github.com/jmchilton/galaxy/actions/runs/19865852088/job/56928306462

FAILED lib/galaxy_test/api/test_tools.py::TestToolsApi::test_allow_uri_if_protocol_on_collection_with_deferred - AssertionError: Final state - error - not okay. Full response: {'model_class': 'History', 'id': '47dd087789ea7ece', 'name': 'test_history', 'deleted': False, 'purged': False, 'archived': False, 'url': '/api/histories/47dd087789ea7ece', 'published': False, 'count': 6, 'annotation': None, 'tags': [], 'update_time': '2025-12-02T17:19:23.358756', 'preferred_object_store_id': None, 'contents_url': '/api/histories/47dd087789ea7ece/contents', 'size': 182, 'user_id': 'adb5f5c93f827949', 'create_time': '2025-12-02T17:19:19.595928', 'importable': False, 'slug': None, 'username': 'user--bx--psu--edu', 'username_and_slug': None, 'genome_build': None, 'state': 'error', 'state_ids': {'new': [], 'upload': [], 'queued': [], 'running': [], 'ok': ['0a0a5bcd98edfdcc'], 'empty': [], 'error': ['ea20eed3125afe51'], 'paused': [], 'setting_metadata': [], 'failed_metadata': [], 'deferred': ['b533467cdeb50a18', '50c3a241189ab841'], 'discarded': []}, 'state_details': {'new': 0, 'upload': 0, 'queued': 0, 'running': 0, 'ok': 1, 'empty': 0, 'error': 1, 'paused': 0, 'setting_metadata': 0, 'failed_metadata': 0, 'deferred': 2, 'discarded': 0}}

How to test the changes?

(Select all options that apply)

• This is a refactoring of components with existing test coverage.

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[nsoranzo]

FAILED lib/galaxy_test/api/test_tools.py::TestToolsApi::test_allow_uri_if_protocol_on_deferred_input - AssertionError: assert 'This is a line of text.' == 'base64://VGhpcyBpcyBhIGxpbmUgb2YgdGV4dC4K'
  
  - base64://VGhpcyBpcyBhIGxpbmUgb2YgdGV4dC4K
  + This is a line of text.

seems a relevant API test failure.

[jmchilton]

Yeah - that tool takes in URIs - shouldn't have been updated - thanks for the catch @nsoranzo !

[nsoranzo]

test_allow_uri_if_protocol_on_collection_with_deferred is also failing.

[jmchilton]

Thanks @nsoranzo - I appreciate all the help.

[github-actions]

This PR was merged without a "kind/" label, please correct.