# Interfaces

Server-side marker interfaces extending the shared Common interfaces. Used for DI registration and type safety.

## Key Files

- **`IFruitBankDataControllerServer.cs`** — Extends IFruitBankDataControllerCommon. Empty server marker.
- **`ICustomOrderSignalREndpointServer.cs`** — Extends ICustomOrderSignalREndpointCommon. Empty server marker.
- **`IStockSignalREndpointServer.cs`** — Extends IStockSignalREndpointCommon. Empty server marker.