Python images for Embr

[Shilpi Rachna (ShilpiRach)]

Summary

Adds Embr-specific Python Resolute runtime images for Python 3.13, 3.14, and 3.15.

The Embr Python image path is separate from the default Oryx Python image generation path and uses Embr-specific version metadata from images/embrconstants.yml.

Changes

• Added Embr Python Resolute runtime image build and test scripts.
• Added images/runtime/python/embr/template.Dockerfile.
• Added Embr Python version and SHA metadata for:
  • Python 3.13.15
  • Python 3.14.7
  • Python 3.15.0b3
• Added Embr Python README documentation.
• Aligned the Embr Python runtime image with the default Python 3.15 Resolute image shape, including:
  • Oryx startup command generator
  • Python installed under /opt/python
  • Gunicorn support
  • Azure Linux certificate import
• Added SQL Server ODBC support only to the Embr Python image:
  • msodbcsql18
  • mssql-tools18
• Intentionally does not include uvicorn / uvicorn-worker; customers can add those through app dependencies when needed.

Default image impact

This PR does not change the default Python image generation path. It does not modify default Python version metadata, default Python Dockerfiles, or default runtime image build logic.

Validation

• Added image tests for Python version/runtime behavior.
• Added startup command generation validation.
• Added checks for Gunicorn and SQL Server ODBC availability in the Embr image.