revert(json): remove SetEscapeHTML(false) from Encode function

The SetEscapeHTML(false) change did not propagate through orderedmap.MarshalJSON()
which creates its own json.NewEncoder without the setting. Since all local JSON files
go through the orderedmap path, the change had inconsistent behavior and risked
altering encoding of existing configs. Revert to original json.MarshalIndent/json.Marshal.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Matovidlo

internal/pkg/encoding/json/json.go

@@ -10,22 +10,18 @@ import (
 type RawMessage = json.RawMessage
 
 func Encode(v any, pretty bool) ([]byte, error) {
-	var buf bytes.Buffer
-	enc := json.NewEncoder(&buf)
-	enc.SetEscapeHTML(false)
+	var data []byte
+	var err error
 	if pretty {
-		enc.SetIndent("", "  ")
+		data, err = json.MarshalIndent(v, "", "  ")
+		data = append(data, '\n')
+	} else {
+		data, err = json.Marshal(v)
 	}
-	if err := enc.Encode(v); err != nil {
+	if err != nil {
 		return nil, processJSONEncodeError(err)
 	}
-	data := buf.Bytes()
-	if pretty {
-		// json.Encoder always appends a newline, which matches the previous behavior for pretty output.
-		return data, nil
-	}
-	// For non-pretty output, strip the trailing newline appended by json.Encoder.
-	return bytes.TrimRight(data, "\n"), nil
+	return data, nil
 }
 
 func MustEncode(v any, pretty bool) []byte {