Add delete to IndexResource

[mathislucka]

Consult REPO.md to figure out the repository structure.

Then:

• add a delete method to the IndexResource
• add unit tests for the new method (existing unit tests for index resource)
• add integration tests (existing integration tests for index resource)
• do NOT add corresponding tools

Here is how we delete an index:

Request URL
https://api.cloud.deepset.ai/api/v1/workspaces/test-workspace/indexes/Standard-Index-English-2
Request Method
DELETE
Status Code
204 No Content

[mathislucka]

Looks good for the implementation, but please check the tests again:

3s
2s
Run uv run --dev pytest -m "not integration"
============================= test session starts ==============================
platform linux -- Python 3.11.12, pytest-8.3.5, pluggy-1.6.0
rootdir: /home/runner/work/deepset-mcp-server/deepset-mcp-server
configfile: pyproject.toml
testpaths: test
plugins: asyncio-0.26.0, anyio-4.9.0
asyncio: mode=Mode.AUTO, asyncio_default_fixture_loop_scope=function, asyncio_default_test_loop_scope=function
collected 185 items / 27 deselected / 158 selected

test/unit/api/custom_components/test_custom_components_resource.py .... [ 2%]
test/unit/api/haystack_service/test_haystack_service_resource.py ..... [ 5%]
test/unit/api/indexes/test_index_resource.py ...........F.. [ 14%]
test/unit/api/pipeline/test_pipeline_resource.py ....................... [ 29%]
.................. [ 40%]
test/unit/api/pipeline_template/test_pipeline_template_resource.py ..... [ 43%]
.. [ 44%]
test/unit/api/user/test_user_resource.py ... [ 46%]
test/unit/test_async_deepset_client.py ...... [ 50%]
test/unit/tools/test_component_helper.py ... [ 52%]
test/unit/tools/test_custom_components.py ....... [ 56%]
test/unit/tools/test_formatting_utils.py ....... [ 61%]
test/unit/tools/test_haystack_service.py ......... [ 67%]
test/unit/tools/test_indexes.py ................ [ 77%]
test/unit/tools/test_pipeline.py ........................ [ 92%]
test/unit/tools/test_pipeline_template.py ............ [100%]

=================================== FAILURES ===================================
________________ TestIndexResource.test_delete_index_successful ________________

self = <test.unit.api.indexes.test_index_resource.TestIndexResource object at 0x7fcacb8f6c90>
fake_client = <test.unit.conftest.BaseFakeClient object at 0x7fcacb30a090>
workspace = 'test-workspace'

async def test_delete_index_successful(
    self, fake_client: BaseFakeClient, workspace: str
) -> None:
    """Test deleting an index successfully."""
    fake_client.responses[f"/v1/workspaces/{workspace}/indexes/test-index"] = TransportResponse(
        status_code=[20](https://github.com/deepset-ai/deepset-mcp-server/actions/runs/15393254267/job/43307435205?pr=79#step:6:21)4, json={}, text=""
    )

    resource = IndexResource(fake_client, workspace)
    await resource.delete("test-index")

    # Verify request
    last_request = fake_client.requests[-1]
    assert last_request["method"] == "DELETE"

  assert last_request["url"] == f"/v1/workspaces/{workspace}/indexes/test-index"

E KeyError: 'url'

test/unit/api/indexes/test_index_resource.py:269: KeyError