- 7-table schema: campaigns, reports, messages, indicators, classifications, remediation_actions, audit_events
- reports table fully designed with ticket_id FK, content_hash (D-04 idempotency), matched_patterns, evidence (EVID-01) columns
- All tables/indexes use IF NOT EXISTS for idempotent re-application
- Remaining 6 tables are stubs for Phases 16-21