Moved generic and broadly useful helper functions upstream into feedkit

internal/normalizers/common/json.go

@@ -2,11 +2,11 @@
 package common
 
 import (
-	"encoding/json"
 	"fmt"
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/event"
+	fknormalize "gitea.maximumdirect.net/ejr/feedkit/processors/normalize"
 )
 
 // DecodeJSONPayload extracts the event payload as bytes and unmarshals it into T.
@@ -18,19 +18,7 @@ import (
 // Errors include a small amount of stage context ("extract payload", "decode raw payload").
 // Callers typically wrap these with a provider/kind label.
 func DecodeJSONPayload[T any](in event.Event) (T, error) {
-	var zero T
-
-	b, err := PayloadBytes(in)
-	if err != nil {
-		return zero, fmt.Errorf("extract payload: %w", err)
-	}
-
-	var parsed T
-	if err := json.Unmarshal(b, &parsed); err != nil {
-		return zero, fmt.Errorf("decode raw payload: %w", err)
-	}
-
-	return parsed, nil
+	return fknormalize.DecodeJSONPayload[T](in)
 }
 
 // NormalizeJSON is a convenience wrapper for the common JSON-normalizer pattern: