Function requireHeader

requireHeader(
headerName: string,
expectedValue?: string,
): ContextProvider<ActionContext>
Creates a context provider that requires a specific header to be present.
Parameters
- headerName: string
- OptionalexpectedValue: string
Returns ContextProvider<ActionContext>
Example
```
// Require header to exist
const callable = onCallGenkit(
  { contextProvider: requireHeader('X-Request-ID') },
  myFlow
);

// Require header to have specific value
const callable = onCallGenkit(
  { contextProvider: requireHeader('X-API-Version', '2.0') },
  myFlow
);
```
- Defined in src/azure_functions.ts:956