feat(api): include more details about changes

Expose old and details fields.

Fixes #11807

docs/api.rst

@@ -2209,7 +2209,9 @@ Changes
     :>json timestamp timestamp: event timestamp
     :>json int action: numeric identification of action
     :>json string action_name: text description of action
-    :>json string target: event changed text or detail
+    :>json string target: event changed text
+    :>json string old: previous text
+    :>json object details: additional details about the change
     :>json int id: change identifier
 
 Screenshots

docs/changes.rst

@@ -15,6 +15,7 @@ Not yet released.
 * Improved tracking of uploaded changes.
 * Grafully handle temporary machine translation errors in automatic suggestions.
 * :http:get:`/api/units/(int:id)/` now includes `last_updated` timestamp.
+* :http:get:`/api/changes/(int:id)/` now includes `old` and `details`.
 * Reduced memory usage and increased performance of some views.
 
 **Bug fixes**

weblate/api/serializers.py

@@ -1335,6 +1335,8 @@ class Meta:
             "timestamp",
             "action",
             "target",
+            "old",
+            "details",
             "id",
             "action_name",
             "url",