fix: security hardening, real AI costs, traceId propagation & audit logging

feat(billing): complete billing system, push notifications, and tech debt fixes

feat(meta-status): store metaBusinessId for reliable business verification

feat(meta): live Meta verification status + WhatsApp setup fixes

feat: implement bulk whatsapp campaigns with BullMQ and modular activation refactor (isCrmActive/isEdTechActive)

feat: add organization useCase selection to modal and backend

chore: deploy manual fixes for TS strict mode

feat: implement PaaS modularity foundation (Contact model, modular OrganizationMode, and redesigned creation modal)

feat: migrate to multi-tenant SaaS architecture with JWT auth and BullMQ notifications

feat: Premium Onboarding with Meta SDK and Technical Debt resolution

chore: major tech debt cleanup v2.1 - Type Safety & Observability

fix: resolve ESM module not found error in database package

feat(ui): complete landing page and admin dashboard exports

Initial commit: Monorepo setup with React+Vite, Fastify, Prisma, and Docker Compose