Utilize the Tenancy and Identity projects

[marinasundstrom]

Every service should use the Tenancy and Identity projects.

These projects expose ITenantService and ICurrentUserService, with implementations.

Sales and TimeReport already do use this.

Implemented in:

• [x] Catalog
• [x] Sales
• [x] Showroom
• [x] TimeReport
• [x] Customers
• [x] Ticketing
• [x] Invoicing
• [x] Payments
• [ ] Transactions
• [x] Accounting
• [ ] RotRutService
• [x] Notifications
• [x] Carts
• [ ] Inventory
• [ ] AppService
• [ ] Documents
• [ ] EmailService

[marinasundstrom]

Done here: https://github.com/marinasundstrom/YourBrand/commit/3a8c89c50bdea647e0c73c350f77b68b0678a32e

And here: https://github.com/marinasundstrom/YourBrand/commit/5d7916d73960d70abb9fd8af2f9fd8679a2facc1

[marinasundstrom]

Add a checkable list of projects where this has been implemented so far.