itdove/devaiflow#191: Add model information to commit message attribution

[itdove]

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Jira Issue:

Description

Adds model-aware attribution to commit messages and PR descriptions. Previously, the Co-Authored-By line used a generic assistant name. This change introduces a model_provider utility (devflow/utils/model_provider.py) that detects the active AI model and includes its name in the Co-Authored-By trailer, giving clearer provenance for AI-assisted contributions.

Changes:

• devflow/utils/model_provider.py — New utility to resolve the current model name for attribution
• devflow/cli/commands/complete_command.py — Use model-aware Co-Authored-By line when creating commits
• devflow/cli/commands/export_command.py — Use model-aware Co-Authored-By line when generating PR descriptions
• tests/test_model_attribution.py — Unit tests for model attribution logic

Resolves: #191

Assisted-by: Claude

Testing

Steps to test

1. Pull down the PR
2. Run the test suite: pytest tests/test_model_attribution.py -v
3. Start a session with a known model (e.g., Claude), make changes, and run daf complete
4. Inspect the resulting commit message — verify the Co-Authored-By line includes the model name
5. Run daf export and verify the PR description also contains the model-aware attribution
6. Test with different model configurations to confirm the provider utility resolves correctly

Scenarios tested

• Commit attribution includes model name when model info is available
• PR export includes model-aware Co-Authored-By line
• Fallback behavior when model information is unavailable
• Unit tests for model provider resolution logic

Deployment considerations

• This code change is ready for deployment on its own
• This code change requires the following considerations before being deployed: