Fix: upload PDF via PUT (API rejects POST)

backend/worker/worker.py

@@ -11,7 +11,7 @@ def _upload_pdf_to_api(pdf_id, pdf_path, pdf_name):
     url = base.rstrip("/") + "/api/pdf/" + str(pdf_id)
     print(f"[worker] uploading pdf_id={pdf_id} to {url}")
     with open(pdf_path, "rb") as f:
-        r = requests.post(
+        r = requests.put(
             url,
             files={"file": (f"{pdf_id}.pdf", f, "application/pdf")},
             data={"pdf_name": pdf_name},
@@ -162,7 +162,7 @@ def _process_train_label(gmail: GmailClient, s: Settings, root: Path) -> None:
             try:
                 if PDF_TRAINER_API_BASE:
                     with open(stored_pdf_path, "rb") as f:
-                        r = requests.post(
+                        r = requests.put(
                             f"{PDF_TRAINER_API_BASE.rstrip('/')}/api/pdf/{pdf_id}",
                             files={"file": (f"{pdf_id}.pdf", f, "application/pdf")},
                             data={"pdf_name": filename},
@@ -179,7 +179,7 @@ def _process_train_label(gmail: GmailClient, s: Settings, root: Path) -> None:
             try:
                 if PDF_TRAINER_API_BASE:
                     with open(stored_pdf_path, "rb") as f:
-                        requests.post(
+                        requests.put(
                             f"{PDF_TRAINER_API_BASE.rstrip('/')}/api/pdf/{pdf_id}",
                             files={"file": (f"{pdf_id}.pdf", f, "application/pdf")},
                             data={"pdf_name": filename},