Public-facing Hypothesis system status alerts

Create dedicated public-facing resource(s) to allow users to check on the status of Hypothesis services.

Examples of this could be:
- Web page showing status, along with relevant info/notes
- Programmatically accessible API endpoints for public querying
- etc

User request for web page: https://app.hubspot.com/contacts/6291320/ticket/283835999/
User request for programatic monitoring: https://app.hubspot.com/contacts/6291320/ticket/283125787/

Start by reviewing the issue's two linked HubSpot requests and deciding whether the required outcome is a public status page, programmatic API endpoints, or both. Define the services, status information, and access needs before implementation; the work is done when users and monitoring tools can reliably query the agreed public status resource.

Written by the indexing model from the issue text.