Add new event tracking To-Do List user volume for SM installations

What does this MR do and why?

This merge request adds tracking functionality for when users view their To-Do List. It introduces a new internal event called 'view_todo_list' that is triggered when a user accesses their To-Do List. The changes include updating the TodosController to track this event, creating a configuration file for the new event, and setting up a metric to count unique users who view the To-Do List. These additions will help monitor user engagement with the To-Do List feature across different tiers (free, premium, and ultimate) and provide insights into its usage over 7-day and 28-day periods. The feature is set to be introduced in milestone 17.9 and is categorized under personal productivity and notifications.

References

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• Relates to Instrument product usage for Vue to-do list (#464083 - closed)

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changed milestone to %17.10

added Category:Notifications typemaintenance labels

assigned to @jtucker_gl

added pipelinetier-1 label

added devopsfoundations grouppersonal productivity sectioncore platform labels

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• 559a2748 - Add MR url

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• 7e6ecb4f - Update the other yaml file as well

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added analytics instrumentation analytics instrumentationreview pending labels

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Category	Reviewer	Maintainer
analytics instrumentation	@j_lar (UTC+1)	Maintainer review is optional for analytics instrumentation
backend	@squadri (UTC+0)	@jagood (UTC-5)

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Generated by Danger

Hey @j_lar, could you review this MR that adds a new service ping metric? Thank you!

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• dbcb9c70 - Add spec for new tracking event

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requested review from @j_lar

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approved this merge request

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