Added schema placeholders for dynamic data (#2)

- #/definitions/files_list (for AutotestFile, referring to a script file uploaded by the instructor)
- #/definitions/extra_group_data (for additional data inserted by MarkUs)
- #/definitions/test_data_categories (for the category names inserted by MarkUs)

Author: david-yz-liu

markus_autotesting_core/types/types.py

@@ -81,7 +81,12 @@ class BaseTestData(
     """
 
     category: Annotated[
-        list[Annotated[str, Meta(extra_json_schema={"enum": [], "enumNames": []})]],
+        list[
+            Annotated[
+                str,
+                Meta(extra_json_schema={"$ref": "#/definitions/test_data_categories"}),
+            ]
+        ],
         Meta(title="Category", extra_json_schema={"uniqueItems": True}),
     ]
 
@@ -97,9 +102,13 @@ class BaseTestData(
     feedback_file_names: Annotated[list[str], Meta(title="Feedback files")]
     """A list of file paths generated by executing this test group."""
 
-    extra_info: dict = {}
-    """TODO"""
+    extra_info: Annotated[
+        Any, Meta(extra_json_schema={"$ref": "#/definitions/extra_group_data"})
+    ] = {}
+    """Additional information for this test group."""
 
 
-AutotestFile = Annotated[str, Meta(extra_json_schema={"enum": []})]
+AutotestFile = Annotated[
+    str, Meta(extra_json_schema={"$ref": "#/definitions/files_list"})
+]
 """A placeholder in the JSON schema representing one of the files provided to the autotesting environment."""