Implement Multi-Tenant Database Structure for EnrollNow

[agaesh]

Title:

Description:
We need to enhance EnrollNow’s architecture by introducing a multi-tenant database structure to ensure proper data isolation and scalability for multiple organizations (tenants).

Currently, all tenant data resides in a shared schema without strict isolation. This poses risks in terms of data security, performance, and customization.

Proposed Approach:

1. Architecture Choice:

   • Database-per-tenant: Each tenant gets its own database.
   • OR Schema-per-tenant: Shared database but separate schemas per tenant.
   • Evaluate trade-offs for performance, cost, and ease of maintenance.

2. Tenant Identification:

   • Implement tenant resolution logic based on subdomain, custom domain, or authentication metadata.

3. Automated Provisioning:

   • On new tenant signup, automatically create the database/schema and run migrations.

4. Connection Management:

   • Implement dynamic connection handling in Sequelize based on the resolved tenant.

5. Data Security:

   • Ensure strict separation so that no tenant can access another tenant’s data.

6. Migration Strategy:

   • Create a robust migration script to handle new tenant database initialization and updates.

Acceptance Criteria:

• ✅ System should automatically provision a database/schema for a new tenant.
• ✅ Tenant isolation must be enforced at the database level.
• ✅ No downtime when onboarding a new tenant.
• ✅ Document the multi-tenant structure in README.md.

References:

• [Sequelize Multi-Tenant Pattern Example](https://sequelize.org/master/manual/advanced-many-to-many.html)
• [Best Practices for SaaS Multi-Tenancy](https://learn.microsoft.com/en-us/azure/architecture/saas/)

Priority: High
Type: Enhancement