Pos_Invoicing

Implement Store entity linked to an Organization. This allows businesses to create and manage multiple outlets with proper address and state details required for GST compliance.

Each store must belong to a single organization and include mandatory state information to ensure correct GST mapping and validation.

Acceptance Criteria:

Store must belong to one organization
Store must have valid state and address
Tenant isolation enforced
Store status (active/inactive) supported

Subtasks:

Create Store table
Add organization_id & tenant_id mapping
Implement validations
Create CRUD APIs