Data Loading Refactor: Extract Data Loading Logic from app.py

Type: Refactor
Priority: Medium

Description

Move data loading logic from app.py into a dedicated module to improve code organization and maintain separation of concerns.

Current State

• Data loading logic for MOS data and VWC path mapping is currently located in app.py
• This violates separation of concerns and makes the main application file more complex than necessary

Required Changes

1. Create new file data/data_loader.py
2. Extract data loading functions from app.py into data_loader.py
3. Update app.py to import the necessary functions from data_loader
4. Run existing test suite to verify data loading functionality remains intact

Files Affected

• app.py (modify)
• data/data_loader.py (create)

Acceptance Criteria

• All data loading logic moved to data_loader.py
• app.py imports and uses functions from data_loader
• All existing tests pass
• No changes to current data loading behavior