Performer custom fields (#5487)

* Backend changes
* Show custom field values
* Add custom fields table input
* Add custom field filtering
* Add unit tests
* Include custom fields in import/export
* Anonymise performer custom fields
* Move json.Number handler functions to api
* Handle json.Number conversion in api

pkg/utils/map_test.go

@@ -1,11 +1,8 @@
 package utils
 
 import (
-	"encoding/json"
 	"reflect"
 	"testing"
-
-	"github.com/stretchr/testify/assert"
 )
 
 func TestNestedMapGet(t *testing.T) {
@@ -282,55 +279,3 @@ func TestMergeMaps(t *testing.T) {
 		})
 	}
 }
-
-func TestConvertMapJSONNumbers(t *testing.T) {
-	tests := []struct {
-		name     string
-		input    map[string]interface{}
-		expected map[string]interface{}
-	}{
-		{
-			name: "Convert JSON numbers to numbers",
-			input: map[string]interface{}{
-				"int":    json.Number("12"),
-				"float":  json.Number("12.34"),
-				"string": "foo",
-			},
-			expected: map[string]interface{}{
-				"int":    int64(12),
-				"float":  12.34,
-				"string": "foo",
-			},
-		},
-		{
-			name: "Convert JSON numbers to numbers in nested maps",
-			input: map[string]interface{}{
-				"foo": map[string]interface{}{
-					"int":           json.Number("56"),
-					"float":         json.Number("56.78"),
-					"nested-string": "bar",
-				},
-				"int":    json.Number("12"),
-				"float":  json.Number("12.34"),
-				"string": "foo",
-			},
-			expected: map[string]interface{}{
-				"foo": map[string]interface{}{
-					"int":           int64(56),
-					"float":         56.78,
-					"nested-string": "bar",
-				},
-				"int":    int64(12),
-				"float":  12.34,
-				"string": "foo",
-			},
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			result := ConvertMapJSONNumbers(tt.input)
-			assert.Equal(t, tt.expected, result)
-		})
-	}
-}