Refactor Training Loop into a Class (✓ Sandbox Passed)

[sweep-nightly[bot]]

Description

This pull request refactors the training loop in the main.py file into a class called Trainer. It also updates the api.py file to use the Trainer class for loading the model and making predictions.

Summary

• Refactored the training loop in main.py into a Trainer class
• Updated api.py to use the Trainer class for loading the model and making predictions

Fixes #6.

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[sweep-nightly[bot]]

Sandbox Executions

• [X] Ran sandbox for src/main.py. ✓

  Sandbox logs for https://github.com/sweepai/evals/commit/7a0e73c7322bb5e768e759e4b59b3cdf8347b506

trunk fmt src/main.py || exit 0 1/2 ✓

 ✔ Formatted src/main.py
Re-checking autofixed files...

Checked 1 file
✔ No issues
Run trunk upgrade to upgrade 1 linter

trunk check --fix --filter=-ruff --print-failures src/main.py 2/2 ✓

Checked 1 file
✔ No issues

• [X] Ran sandbox for src/main.py. ✗

  Run `src/main.py` through the sandbox.

• [X] Ran sandbox for src/api.py. ✓

  Sandbox logs for https://github.com/sweepai/evals/commit/7cf31a863bab21eb403f4d15ce467e4cd8ecf888

trunk fmt src/api.py || exit 0 1/2 ✓

 ✔ Formatted src/api.py
Re-checking autofixed files...

 ✔ Formatted src/api.py
Re-checking autofixed files...

Checked 1 file
✔ No issues
Run trunk upgrade to upgrade 1 linter

trunk check --fix --filter=-ruff --print-failures src/api.py 2/2 ✓

Checked 1 file
✔ No issues

[sweep-nightly[bot]]

Apply Sweep Rules to your PR?

• [ ] Apply: All docstrings and comments should be up to date.
• [ ] Apply: Code should be properly formatted and indented.
• [ ] Apply: Variable and function names should be descriptive and follow a consistent naming convention.
• [ ] Apply: Imports should be organized and grouped together.
• [ ] Apply: There should be no unused imports or variables.
• [ ] Apply: Code should be properly commented and include docstrings for functions and classes.