Add Keynote to PDF conversion utilities for Cortex Cognitive Indexes

[ademgcl]

This pull request includes several updates to the helper-apps/cortex-file-converter directory, primarily focusing on adding utilities for converting Apple Keynote (.key) files to PDF format and processing files stored in Azure Blob Storage. The most important changes are the addition of new scripts for handling the conversion and listing blob extensions, as well as updates to the README file and requirements.

New utilities and scripts:

• helper-apps/cortex-file-converter/README.md: Added detailed documentation for the process_azure_keynotes.py and key_to_pdf.py scripts, including their purpose, functionality, prerequisites, and usage instructions.

• helper-apps/cortex-file-converter/key_to_pdf.py: Introduced a standalone command-line utility to convert a single local Keynote file to PDF using AppleScript. This script includes argument parsing, error handling, and detailed logging.

• helper-apps/cortex-file-converter/list_blob_extensions.py: Added a script to list blob extensions in an Azure Blob Storage container, focusing on identifying unsupported file formats for Azure Cognitive Search.

• helper-apps/cortex-file-converter/process_azure_keynotes.py: Created a script to connect to an Azure Blob Storage container, identify .key files, convert them to PDF if a PDF version doesn't already exist, and upload the resulting PDF back to the container. This script includes detailed logging and error handling.

Dependency updates:

• helper-apps/cortex-file-converter/requirements.txt: Added the azure-storage-blob library as a dependency for the new scripts.

[Copilot]

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• helper-apps/cortex-file-converter/requirements.txt: Language not supported

Comments suppressed due to low confidence (3)

helper-apps/cortex-file-converter/process_azure_keynotes.py:96

• [nitpick] Consider making 'container_name' configurable via an environment variable or a command-line argument to allow greater flexibility in different deployment environments.

container_name = "cortex-entity-indexed"

helper-apps/cortex-file-converter/process_azure_keynotes.py:82

• [nitpick] Consider narrowing the scope of the exception handling to log more detailed context, which can help with debugging without masking specific issues.

except Exception as e:

helper-apps/cortex-file-converter/key_to_pdf.py:27

• [nitpick] Consider refining this log message to clarify that an existing output file was removed as a preparatory step for conversion, improving log clarity.

print(f"Removed existing output file: {pdf_path}")