fix(General): make auth header optional for forward auth endpoint

src/main/java/com/cleverthis/authservice/controller/AuthController.java

@@ -201,7 +201,7 @@ public class AuthController {
             return Mono.just(ResponseEntity.status(HttpStatus.NO_CONTENT).build());
         }
         if (authorizationHeader == null) {
-            return Mono.just(ResponseEntity.status(HttpStatus.UNAUTHORIZED).build());
+            return Mono.just(ResponseEntity.status(HttpStatus.BAD_REQUEST).build());
         }
         // no pass-through, check permission
         final var accessToken = extractBearerToken(authorizationHeader);