fix(core): preserve data integrity and bound shared UI and response work

Release v0.1.46. Coordinated integrity review: GovOPlaN/govoplan-core#298.

tests/test_tabular_source_contract.py

@@ -178,6 +178,29 @@ class TabularSourceContractTests(unittest.TestCase):
         with self.assertRaises(TabularSourceValidationError):
             parse_tabular_csv("id,name\n1,Ada,extra\n")
 
+    def test_text_csv_mode_preserves_lexical_values_and_explicit_empty_records(self) -> None:
+        source = 'id,value\r\n9007199254740993,"  keep me  "\r\ntrue,0.123456789012345678901234567890\r\n"   ",""\r\n'
+        self.assertEqual(
+            (
+                {"id": "9007199254740993", "value": "  keep me  "},
+                {"id": "true", "value": "0.123456789012345678901234567890"},
+                {"id": "   ", "value": ""},
+            ),
+            parse_tabular_csv(source, value_mode="text"),
+        )
+        self.assertEqual(({"value": "   "},), parse_tabular_csv('value\n"   "\n', value_mode="text"))
+
+    def test_text_csv_mode_rejects_shape_loss_and_applies_input_and_row_bounds(self) -> None:
+        for source in ('id,name\n1\n', 'id,name\n1,Ada,\n'):
+            with self.subTest(source=source), self.assertRaises(TabularSourceValidationError):
+                parse_tabular_csv(source, value_mode="text")
+        with self.assertRaises(TabularSourceValidationError):
+            parse_tabular_csv('value\n""\n""\n', value_mode="text", max_rows=1)
+        with self.assertRaises(TabularSourceValidationError):
+            parse_tabular_csv('value\nä\n', value_mode="text", max_bytes=8)
+        with self.assertRaises(TabularSourceValidationError):
+            parse_tabular_csv('value\nx\n', value_mode="unknown")
+
 
 if __name__ == "__main__":
     unittest.main()