Fix: json-encode WH data if specified as params

src/documents/signals/handlers.py

@@ -573,8 +573,16 @@ def run_workflows_updated(sender, document: Document, logging_group=None, **kwar
     max_retries=3,
     throws=(httpx.HTTPError,),
 )
-def send_webhook(url, data, headers, files):
+def send_webhook(url: str, data: dict | str, headers: dict, files: dict | None):
     try:
+        if isinstance(data, dict):
+            httpx.post(
+                url,
+                json=data,
+                headers=headers,
+                files=files,
+            ).raise_for_status()
+        else:
             httpx.post(
                 url,
                 data=data,