Refactor main.py to remove duplicate Flask initialization and inconsistent routes

[mahek-builds]

Description

The current implementation of main.py contains duplicate Flask app initialization, commented-out route definitions, and inconsistent API exposure. This leads to confusion and maintainability issues.

Issues Identified

• Multiple Flask app initializations
• Duplicate and commented-out routes
• Inconsistent API exposure
• Redundant request method checks

Expected Behavior

• Single Flask app initialization
• Clean and active route definitions
• Proper delegation to session_route
• One clear entry point for running the server

Proposed Solution

• Remove duplicate code
• Consolidate routes
• Clean up commented sections
• Maintain proper project structure

Impact

Improves readability, maintainability, and prevents runtime issues.

[shubhapramanik07]

I have submitted a PR addressing this issue. Please review.