Design the data model for an advertiser intake system (similar in spirit to an F1-backed schema). Identify core entities—organization, account, user/seat, campaign, ad group, creative, budget/flight, targeting, frequency-cap policy, billing, approvals—and define key fields and relationships. Provide ERD-level tables with primary/foreign keys; discuss normalization vs denormalization, multi-tenancy and row-level security, configuration versioning and auditability, soft deletes, idempotent imports, and how the schema supports validation and partial onboarding.