[ADD] survey_extra_fields, survey_base : copy modules from v16

survey_extra_fields/models/survey_question.py

@@ -0,0 +1,20 @@
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from odoo import fields, models
+
+
+class SurveyQuestion(models.Model):
+    _inherit = "survey.question"
+
+    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.",
+    )