Symfony Kernel Event to Sentry Events at Transactions

[Avariya]

Problem Statement

Visualization for Symfony events at Sentry Performance monitor. It will allow us to see when User got the response (before kernel.terminate), controller was found.

Solution Brainstorm

Add Sentry span for Symfony Kernel Events (like LCP etc at web vitals)

Looks like it can be done with 0ms spans.