Description
We log messages to Logstash for various errors around image suggestion workflow failures (for example: T313973: GrowthExperiments\NewcomerTasks\AddImage\ServiceImageRecommendationProvider::get Unable to decode JSON response for page {title} upstream connect error or disconnect/reset before headers. reset reason: connection termination). But we don't emit events to Grafana, so that we can plot volume over time, like we do for AddLink.

Acceptance Criteria

1. Visit the Special:Homepage grafana dashboard and see a panel showing "No suggestion found" errors for AddImage

Panel: https://grafana.wikimedia.org/d/vGq7hbnMz/special-homepage-and-suggested-edits?forceLogin&orgId=1&viewPanel=164

Completion checklist

Functionality

• The patches have been code reviewed and merged
• The task passes its acceptance criteria

Engineering

• There are existing and passing unit/integration tests
• Tests for every involved patch should pass
• Coverage for every involved project should have improved or stayed the same

Design & QA

• If the task is UX/Design related: it must be reviewed and approved by the UX/Design team
• Must be reviewed and approved by Quality Assurance.

Documentation

• Related and updated documentation done where necessary
  • Internal technical changes: internal repository documentation must be updated (README.md, JSDoc, PHPDoc)
  • Infrastructure technical changes: technical changes that reflect on environment, infrastructure, endpoints or any other area of interest for technical contributors should be reflected on Extension:GrowthExperiments or Extension:GrowthExperiments/Technical documentation pages.