Fix docker-tests job referencing non-existent test file in pdf_processing_ci.yml

[Copilot]

The PDF processing workflow fails in the docker-tests job because it references test_pdf_processing.py, which doesn't exist. The actual test file is test_pdf_processor_unit.py.

Changes

.github/workflows/pdf_processing_ci.yml (line 335):

- python -m pytest tests/unit/test_pdf_processing.py::TestPDFProcessor::test_pdf_processor_initialization -v
+ python -m pytest tests/unit/test_pdf_processor_unit.py::TestPDFProcessorInitialization::test_given_no_parameters_when_initializing_pdf_processor_then_creates_with_defaults -v

Corrects both the filename and the test path to match the actual test structure that follows GIVEN-WHEN-THEN naming conventions.

Original prompt

Fix PDF Processing Pipeline CI/CD workflow failure (issue #738)

The pdf_processing_ci.yml workflow is failing. Please analyze the workflow logs, identify the root cause, and implement a fix.

References:

• Issue: Fix: PDF Processing Pipeline CI/CD workflow failure (Run 19146999115) #738
• Workflow: .github/workflows/pdf_processing_ci.yml

Please ensure all PDF processing tests pass after your fix.

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