feat(gdk): preserve thinking and redacted-thinking blocks across turns (#11636)

documentation/src/data/gdk-api.json

@@ -410,6 +410,18 @@
                   "type": "String",
                   "default": null,
                   "docs": ""
+                },
+                {
+                  "name": "provider_metadata_json",
+                  "type": "Option<String>",
+                  "default": null,
+                  "docs": ""
+                },
+                {
+                  "name": "tool_error_json",
+                  "type": "Option<String>",
+                  "default": null,
+                  "docs": ""
                 }
               ]
             },
@@ -669,6 +681,12 @@
                   "type": "String",
                   "default": null,
                   "docs": ""
+                },
+                {
+                  "name": "provider_metadata_json",
+                  "type": "Option<String>",
+                  "default": null,
+                  "docs": ""
                 }
               ]
             },
@@ -800,6 +818,12 @@
               "default": null,
               "docs": ""
             },
+            {
+              "name": "content",
+              "type": "Vec<MessageContent>",
+              "default": null,
+              "docs": "The assistant turn as binding types, ready to append to history and replay on the next request without reparsing `message_json`."
+            },
             {
               "name": "usage",
               "type": "Option<Usage>",