Improve telemetry with deeper insights into system usage

[licitdev]

Scope

What's changed:

• Filter by active users instead of all users
• Filter by enabled extensions instead of all extensions
• Add field counts: fields_max & fields_total
• Add database size

Potential Risks / Drawbacks

• More queries to the DB.

Review Notes / Questions

• The queries had been tested on the DB containers, but wrapped in a try-catch in case it fails.

---

Fixes #21982

[changeset-bot]

🦋 Changeset detected

Latest commit: dcf8332

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@directus/api	Patch
directus	Patch

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[paescuj]

Great work ✨

• For the newly introduced data (db size, and especially fields count) do we expect them to perform well? Wondering after seeing this comment:

  directus/api/src/telemetry/utils/get-item-count.ts

  Lines 49 to 50 in b4645f7

  	// Counts can be a little heavy if the table is very large, so we'll only ever execute 3 of these
  	// queries simultaneously to not overload the database

• Just because it might be good to know (and maybe add inline docs): Do (some of) the DB size queries require some special DB permissions?

Added changes :)