fix: Refactor track endpoint to consolidate routes

[dev-bre]

This pull request simplifies the routing logic for the /track and /api/track endpoints in internal/server/routes.go, making the code cleaner and preventing issues with trailing slash redirects. The main change is the removal of grouped routes in favor of direct route registration.

Routing improvements:

• Replaced grouped route registration for /track and /api/track with direct POST route handlers, eliminating unnecessary route groups and preventing trailing slash redirect issues.
• Reused a single instance of EventHandler for both endpoints, reducing redundant object creation.… slash redirects

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Related Issue

Closes #(issue number)

How Has This Been Tested?

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Screenshots (if applicable)

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Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes