Move middleware context handler logic to service (#29605)

* middleware: Move context handler to own service

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

Co-authored-by: Emil Tullsted <sakjur@users.noreply.github.com>
Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>

pkg/api/common.go

@@ -85,7 +85,7 @@ func Success(message string) *NormalResponse {
 	return JSON(200, resp)
 }
 
-// Error create a erroneous response
+// Error creates an error response.
 func Error(status int, message string, err error) *NormalResponse {
 	data := make(map[string]interface{})