Fix MinioStorage.upload_file → .upload + suppress instant delivery during eSign pause

- upload_file doesn't exist on MinioStorage — the method is upload()
- Return [] when pausing for eSign so job_server doesn't trigger instant delivery

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/workers/services/rmd_filing.py

@@ -91,7 +91,7 @@ class RMDFilingHandler(BaseServiceHandler):
                 if path.endswith(".pdf"):
                     remote = f"compliance/{order_number}/{os.path.basename(path)}"
                     try:
-                        storage.upload_file(path, remote)
+                        storage.upload(path, remote)
                         minio_paths.append(remote)
                     except Exception as exc:
                         logger.warning("MinIO upload failed for %s: %s", path, exc)