Problem statement

OpenSRE currently has no WhatsApp integration. On-call engineers who rely on WhatsApp for mobile notifications and team communication cannot receive investigation findings or escalation alerts through the platform they already use for urgent coordination.

Proposed solution

Add a first-class WhatsApp integration that supports:

• onboarding, authentication (WhatsApp Business API or compatible bridge), and connectivity verification
• sending investigation summaries, root-cause findings, and severity alerts to configured WhatsApp contacts or groups
• mobile-friendly message formatting with key investigation details
• optionally acknowledging or triggering investigations via WhatsApp replies

Acceptance criteria

• the integration is usable from the investigation workflow end to end
• setup and usage are documented clearly
• the implementation is backed by end-to-end tests in tests/e2e or equivalent
• the PR includes a screen video showing setup plus a successful investigation flow using WhatsApp
• vibecoding without testing will not be allowed; PRs without working end-to-end coverage and screen-video proof should be rejected