Fix Docker build and enable git-based versioning

[CodeVishal-17]

Pull Request

Description

This PR fixes an issue where Docker builds always reported the application
version as 0.0.0, even when git tags were present.

What changed

• Added setuptools-git-versioning to build-system.requires so the plugin
  is available at build time.
• Ensured git metadata is available during the Docker build stage.
• Confirmed the runtime reads the version from package metadata instead of
  relying on git at runtime.

Why

Without setuptools-git-versioning installed at build time, setuptools
silently fell back to 0.0.0. This caused incorrect version logging in
production Docker images.

With this change, Docker images correctly reflect the git tag version
(e.g. 1.4.14) in logs.

Fixes #126

How Has This Been Tested?

• Built the Docker image locally using docker build --no-cache.

• Ran the container and verified the startup logs report the correct version.

• Verified runtime version directly using:
  python -c "from solar_consumer import __version__; print(__version__)"

• Yes

Checklist:

• My code follows OCF's coding style guidelines
• I have performed a self-review of my own code
• I have checked my code and corrected any misspellings