⛔[WIP] Centralized and Isolated Schema

[benflexcompute]

Note

Medium Risk
CI now depends on AWS secrets and CodeArtifact availability to resolve dependencies, which can break tests/builds if credentials or repo config are wrong. Changes also introduce a new private dependency into the build and publish pipelines.

Overview
Adds a reusable composite GitHub Action (setup-codeartifact-poetry-auth) that configures AWS credentials, fetches a CodeArtifact auth token, masks it, and exports Poetry basic-auth environment variables.

Updates CI workflows (test.yml, codestyle.yml, pypi-publish.yml) to require/inherit CodeArtifact read secrets and run the new action before poetry install, enabling installs from the private repository.

Extends pyproject.toml to define an explicit codeartifact Poetry source and adds flow360-schemas from that source; poetry.lock is regenerated accordingly and a small test (tests/test_artifact_import.py) verifies the package is importable.

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