Add `numQueries` to usage stats

[rachaelshaw]

Goal

User story
As a user sending usage statistics,
I want to send stats about the number of queries
so that changes to the UI are made with real query usage in mind.

Objective

Original requests

https://github.com/fleetdm/fleet/issues/23199

Context

• Product designer: @rachaelshaw

Changes

Product

• [x] UI changes: No changes
• [x] CLI (fleetctl) usage changes: No changes
• [x] YAML changes: No changes
• [x] REST API changes: No changes
• [x] Fleet's agent (fleetd) changes: No changes
• [x] Activity changes: No changes
• [x] Permissions changes: No changes
• [x] Changes to paid features or tiers: No changes
• [x] Other reference documentation changes: PR
• [ ] Once shipped, requester has been notified

Engineering

• [x] Feature guide changes: No changes
• [x] Database schema migrations: No changes
• [x] Load testing: No changes
• [x] Implement additional stat per the PR above.
• [ ] Add to our Datadog dashboard.
• [ ] Test-plan - To be created by the DRI engineer and approved by QA person

ℹ️  Please read this issue carefully and understand it. Pay special attention to UI wireframes, especially "dev notes".

QA

Once deployed to Dogfood check that results arrive to Heroku.

Risk assessment

• Requires load testing: TODO
• Risk level: Low / High TODO
• Risk description: TODO

Manual testing steps

1. Step 1
2. Step 2
3. Step 3

Testing notes

Confirmation

1. [ ] Engineer (@____): Added comment to user story confirming successful completion of QA.
2. [ ] QA (@____): Added comment to user story confirming successful completion of QA.

[sharon-fdm]

Hey team! Please add your planning poker estimate with Zenhub @iansltx @lucasmrod @mostlikelee

[sharon-fdm]

@eashaw, when we estimated this I forgot to talk about adding this metric to Datadog. Should be a small task but just wanted your attention to it.