minor refactoring of const + better timeout handling in pinter package + api package tests

internal/app/api/pkg/middleware/cleanup.go

@@ -11,7 +11,7 @@ import (
 func Cleanup() echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
-			const op = "middleware.Cleanup"
+			const op string = "middleware.Cleanup"
 			err := next(c)
 			ctx := context.MustCastFromEchoContext(c)
 			r := ctx.Resource()

internal/app/api/pkg/middleware/context.go

@@ -15,13 +15,13 @@ import (
 const (
 	// TestingTraceEnvVar is an environment
 	// variable used in some tests.
-	TestingTraceEnvVar = "TESTING_TRACE"
+	TestingTraceEnvVar string = "TESTING_TRACE"
 	// TestsTracePrefix helps
 	// creating all resources inside a prefix.
 	// Only used in some tests
 	// to check if the resources
 	// have been removed.
-	TestsTracePrefix = "tmp"
+	TestsTracePrefix string = "tmp"
 )
 
 // Context helps extending the default echo.Context with