Fix: Issue #95 - Remove duplicate routes and simplify Flask routing

[shubhapramanik07]

Closes #95

This PR refactors the Flask routing structure to remove duplicate and unused route definitions, ensuring a single clear entry point for the application.

Changes made:

• Cleaned up app/main.py:

  • Removed commented-out and duplicate route blocks
  • Retained only active and necessary route definitions
  • Simplified route handlers to delegate to session routes

• Updated app/routes/session.py:

  • Removed redundant Flask app initialization
  • Ensured routing logic is properly handled from app/main.py

Impact:

• No changes to business logic (calibration or prediction)
• Improved code clarity and maintainability
• Reduced redundancy and confusion in routing structure

Validation:

• Application runs successfully using flask run
• All existing endpoints are accessible and working as expected