Platform docs

Public engineering documentation for a multi-tenant workplace-safety management system ("the platform"). Written for a senior engineer evaluating the design, not as marketing material.

• Architecture — system shape, why it's one deployable, what would change
• Data model — core entities and an ER diagram
• Multi-tenancy — how tenant isolation works today and what's planned
• Alerting — the real path from an event to a notification, with a sequence diagram
• Decisions — design decisions, including ones that didn't hold up
• Screenshots — placeholders for screenshots from a local seeded instance
• Screenshot checklist — what to verify before adding any screenshot to this repo

This repo intentionally omits any client name, industry, region, or deployment identifier. See the screenshot checklist before adding images.