feat: enhance E2E testing setup and model reporting

- Added a new fixture to manage runtime report artifacts in a writable temp directory during E2E tests, addressing permission issues in local CI/dev environments.
- Updated `conftest.py` to include a requirements.txt file in the model packaging path for training activities.
- Refactored existing fixtures to use `pytest.fixture` instead of `pytest_asyncio.fixture` for better compatibility.
- Enhanced the `Reports` class to include a target alias for report metrics, ensuring compatibility with Evidently's reporting requirements.
- Introduced new test scenarios to validate the handling of missing and whitespace-only `date_column` inputs in the training workflow.

These changes improve the robustness of the E2E testing framework and enhance the clarity of model reporting metrics.

model_manager/workflows/train_model.py

@@ -17,6 +17,7 @@ with workflow.unsafe.imports_passed_through():
     from typing import Any
 
     from temporalio.common import RetryPolicy
+    from temporalio.exceptions import ApplicationError
 
     from model_manager.activities.activities import Activities
     from model_manager.activities.experiment_tracking import UpdateType
@@ -95,7 +96,11 @@ class TrainModel:
         """
         workflow.logger.info(f'Starting train_model workflow for {input_data}')
 
-        experiment_run_id = self._validate_experiment_run_id(input_data)
+        try:
+            experiment_run_id = self._validate_experiment_run_id(input_data)
+        except ValueError as exc:
+            # Prevent workflow-task retries on deterministic input contract violations.
+            raise ApplicationError(str(exc), non_retryable=True) from exc
         input_data = {**input_data, 'experiment_run_id': experiment_run_id}
 
         model_name = input_data.get('model_name')