Refactor Training Loop into a Class (✓ Sandbox Passed)

[sweep-nightly]

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 and predicting with the model. Additionally, the code is formatted to adhere to PEP 8 style guidelines.

Summary

• Refactored the training loop in main.py into a Trainer class
• Updated api.py to use the Trainer class for loading and predicting with the model
• Formatted the code to adhere to PEP 8 style guidelines

Fixes #6.

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[sweep-nightly]

Sandbox Executions

• Ran sandbox for src/main.py. ✓

Sandbox logs for https://github.com/sweepai/evals/commit/52cb808b1b8bc91787d586dd565b782319ec01c4

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

• Ran sandbox for src/api.py. ✓

Sandbox logs for https://github.com/sweepai/evals/commit/b31fc724747dc0cd6fdae265be435aa36b06ab4a

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]

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• Apply: Code should be properly commented and include docstrings for functions and classes.