Improve WeKnora upload error diagnostics

@@ -6,7 +6,7 @@ import _bootstrap  # noqa: F401
 
 from weknora_eval.api import client_from_config
 from weknora_eval.config import load_config
-from weknora_eval.loaders import setup_logging, write_jsonl
+from weknora_eval.loaders import append_jsonl, setup_logging, write_jsonl
 from weknora_eval.raw_docs import iter_raw_doc_files
 
 
@@ -16,8 +16,22 @@ def main() -> int:
     client = client_from_config(config)
     files = iter_raw_doc_files()
     rows = []
+    failures = []
     for path in files:
-        data = client.upload_file(path)
+        print(f"Uploading {path}...")
+        try:
+            data = client.upload_file(path)
+        except Exception as exc:  # noqa: BLE001
+            failure = {
+                "file_path": str(path),
+                "file_name": path.name,
+                "file_type": path.suffix.lstrip("."),
+                "error": str(exc),
+            }
+            failures.append(failure)
+            append_jsonl("data/exported/failed_uploads.jsonl", failure)
+            print(f"Upload failed for {path}: {exc}")
+            continue
         rows.append(
             {
                 "knowledge_id": data.get("id"),
@@ -28,9 +42,10 @@ def main() -> int:
                 "raw": data,
             }
         )
+        print(f"Uploaded {path}: knowledge_id={data.get('id')}")
     write_jsonl("data/exported/knowledge_uploads.jsonl", rows)
-    print(f"Uploaded {len(rows)} files")
-    return 0
+    print(f"Uploaded {len(rows)} files, failed {len(failures)} files")
+    return 1 if failures else 0
 
 
 if __name__ == "__main__":

@@ -244,10 +244,13 @@ class WeKnoraClient:
                     continue
                 if response.status_code >= 400:
                     self._log_error(method, url, response)
-                    raise WeKnoraApiError(f"{method} {url} failed with HTTP {response.status_code}")
+                    body = response.text[:1000]
+                    raise WeKnoraApiError(
+                        f"{method} {url} failed with HTTP {response.status_code}: {body}"
+                    )
                 time.sleep(self.request_interval_seconds)
                 return response.json()
-            except (requests.RequestException, ValueError, WeKnoraApiError) as exc:
+            except (requests.RequestException, ValueError) as exc:
                 last_error = exc
                 if attempt >= self.max_retries:
                     break