Artifact: Coaching Question vs Answer — Alex's Validation Design

A directive answer versus a coaching question set for the same stuck design problem -- exercises co-04. Everline and every name here are fictional; every quote is an illustrative, constructed example.

Directive version (what NOT to lead with): "Use a dead-letter queue -- synchronous validation will add latency to the ingestion path and you don't want that on the hot path."

Coaching version (what Priya actually sends):

1. What happens to an event today if it fails validation -- where does it go, and who notices?
2. If you delay the validation to a background process instead of the ingestion path itself, what does the ingestion path gain, and what does it lose?
3. Who's the audience for "an event failed validation" -- is it a human who needs to fix bad data, an alert that needs to fire immediately, or both?