⚙️ Multi-Tenant Architecture
A single codebase serves multiple clients (tenants) with data isolation 🔒
🧱 Tenant Models:
1. Shared DB + Shared Schema (tenant_id)
2. Shared DB + Separate Schemas
3. Separate DB per tenant.
🏢 CRM SaaS App →📦 Key Modules to Build:
Company A & B use the same app, different users/data, same infra
🔹 Tenant onboarding & schema isolation
🔹 Role-based auth (RBAC)
🔹 Per-tenant configs & theming
🔹 Tenant billing & usage tracking
🔹 Superadmin dashboard
🔹 Secure API access
🔹 DevOps: CI/CD + Docker + DB migration
🎯 Used in: LMS, HRMS, CRM, CMS, internal tools, etc.
