Enforce Go style rules across codebase

Apply five style rules: convert iota string enums to typed
string constants, replace errors.As with errors.AsType,
merge three-group imports into two groups, fix multiline
parameter/argument formatting, and replace fmt.Sprintf URL
construction with net/url.

Signed-off-by: Émile Ré <emile@probo.com>

pkg/trust/framework_service.go

@@ -16,9 +16,8 @@ package trust
 
 import (
 	"context"
-	"time"
-
 	"fmt"
+	"time"
 
 	"go.gearno.de/kit/pg"
 	"go.probo.inc/probo/pkg/coredata"