Replace environment file with lock file

[Pajaraja]

Add a requirements.lock.txt file based on environment file to avoid problems with second order dependencies.

We should add checksums to the libraries at a later date. Currently it fails due to different settings for torch when working in a CPU and CUDA environment.

[Copilot]

Pull Request Overview

This PR introduces a lock file approach for Python dependencies by replacing direct environment file usage with a generated requirements.lock.txt file to ensure reproducible builds with pinned second-order dependencies.

• Adds a comprehensive requirements.lock.txt with 486 pinned dependencies generated via pip-compile
• Updates CI workflows to install from the lock file instead of environment.txt
• Maintains backward compatibility by referencing the original environment.txt in the lock file

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
runtime/requirements.lock.txt	New lock file containing all pinned first and second-order dependencies
.github/workflows/runtime-test.yml	Updates test workflow to install from lock file
.github/workflows/publish-to-pypi.yml	Updates publish workflow to install from lock file

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