[ARI-33] Validate AC-01 and AC-06 — Pipeline latency targets

[bjridicodes]

Linear: ARI-33

Type: 🔵 User Story | Sprint: 7 | Points: 5 | AC: AC-01, AC-06

As an on-call engineer, I want ARIA to read an incident within 60 seconds and deliver a notification within 3 minutes of incident creation so that response time is fast enough to matter during an active incident.

Acceptance Criteria

Given a test incident is created in ServiceNow
When ARIA processes it end-to-end
Then the incident is read within 60 seconds of creation (AC-01)

Given the incident is read
When the full pipeline completes
Then a Slack notification is received within 3 minutes of incident creation (AC-06)

Given 10 consecutive test incidents are processed
When latency is measured for each
Then AC-01 passes on all 10 and AC-06 passes on all 10