Closes #909 Remove defaultazurecredential fallback path

[shirasassoon]

This pull request introduces a breaking change to the authentication mechanism in FabricWorkspace: the default credential fallback has been removed, and an explicit token_credential must now be provided for API requests. The codebase and tests have been updated accordingly to enforce this requirement and provide clearer error messaging.

Breaking change to authentication:

• Removed the use of DefaultAzureCredential as a fallback; FabricWorkspace now requires an explicit token_credential to be passed for authentication. Attempting to instantiate without a credential (outside Fabric runtime) raises an InputError with a clear message. [1] [2]

Documentation and interface improvements:

• Updated docstrings in fabric_workspace.py to clarify the requirement for an explicit token_credential and provide usage examples.

Test suite updates:

• All tests creating a FabricWorkspace now explicitly provide a DummyTokenCredential to comply with the new requirement, ensuring tests remain valid and pass. This affects multiple test files, including test_publish.py, test_fabric_workspace.py, test_response_collection.py, and test_subfolders.py. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27]

Type annotation improvement:

• Updated the token_credential parameter type in FabricWorkspace.__init__ to be explicitly Optional[TokenCredential] for better type clarity.

[Copilot]

Pull request overview

Removes the DefaultAzureCredential fallback in FabricWorkspace so API authentication requires an explicit token_credential (except when running in Fabric runtime), and updates tests/changelog to match this breaking change.

Changes:

• Enforce explicit token_credential in FabricWorkspace.__init__ (no DefaultAzureCredential fallback outside Fabric runtime).
• Update unit tests to pass DummyTokenCredential when constructing FabricWorkspace.
• Add an unreleased breaking-change entry describing the auth change.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/fabric_cicd/fabric_workspace.py	Removes default credential fallback, raises InputError when credential is missing outside Fabric runtime, and adjusts typing/docstring.
tests/test_publish.py	Passes DummyTokenCredential into FabricWorkspace instances used by publish/unpublish tests.
tests/test_fabric_workspace.py	Updates workspace factory and specific tests to pass DummyTokenCredential.
tests/test_response_collection.py	Supplies DummyTokenCredential for workspace creation in response-collection tests.
tests/test_subfolders.py	Supplies DummyTokenCredential for workspace creation in subfolder tests.
.changes/unreleased/breaking-20260329-150739.yaml	Adds changelog entry documenting the breaking authentication change.

Comments suppressed due to low confidence (1)

src/fabric_cicd/fabric_workspace.py:56

• The docstring now implies/illustrates that FabricWorkspace can be created without a token_credential (see the “Basic usage” examples below), but __init__ will raise an InputError outside Fabric runtime when token_credential is omitted. Update the examples and/or argument description to reflect that token_credential is required outside Fabric runtime (and only auto-generated when running in Fabric).

        Args:
            workspace_id: The ID of the workspace to interact with. Either `workspace_id` or `workspace_name` must be provided. Considers only `workspace_id` if both are specified.
            workspace_name: The name of the workspace to interact with. Either `workspace_id` or `workspace_name` must be provided. Considers only `workspace_id` if both are specified.
            repository_directory: Local directory path of the repository where items are to be deployed from.
            item_type_in_scope: Item types that should be deployed for a given workspace. If omitted, defaults to all available item types.
            environment: The environment to be used for parameterization.
            token_credential: The token credential to use for API requests (e.g., AzureCliCredential, ClientSecretCredential).
            kwargs: Additional keyword arguments.

        Examples:
            Basic usage
            >>> from fabric_cicd import FabricWorkspace
            >>> workspace = FabricWorkspace(