[IMP] survey_extra_fields: new params max_file_size and allowed_extensions for file question type

survey_extra_fields/models/survey_question.py

@@ -9,3 +9,12 @@ class SurveyQuestion(models.Model):
     question_type = fields.Selection(
         selection_add=[("file", "File")]
     )
+    max_file_size = fields.Integer(
+        string="Max File Size (MB)",
+        default=10,
+        help="Maximum file size in MB. Leave 0 for no limit.",
+    )
+    allowed_extensions = fields.Char(
+        string="Allowed Extensions",
+        help="Comma-separated list of allowed extensions (e.g. .pdf,.docx). Leave empty to allow all types.",
+    )