fix: Log 422 response body for debugging

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

Author: joshuanapoli

src/cvec/cvec.py

@@ -140,7 +140,15 @@ def _make_request(
                 # If refresh fails, continue with the original error
                 pass
 
-        response.raise_for_status()
+        try:
+            response.raise_for_status()
+        except requests.exceptions.HTTPError as e:
+            if e.response.status_code == 422:
+                print(
+                    "Received 422 Unprocessable Entity. Response body: "
+                    f"{e.response.text}"
+                )
+            raise
 
         if (
             response.headers.get("content-type")