Fix update_dataset/update_document: backend uses POST not PUT

The NDI Cloud backend (ndi-cloud-node) registers update routes as POST,
not PUT. Our Python client was sending PUT requests which resulted in 404
errors because Express couldn't match the route.

- datasets.py: update_dataset() now uses client.post()
- documents.py: update_document() now uses client.post()
- Removed unnecessary retry_on_404 from update tests (root cause was
  wrong HTTP method, not eventual consistency)

Local results: 55 passed, 3 skipped, 0 failed

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: audristroyer

src/ndi/cloud/api/datasets.py

@@ -45,8 +45,8 @@ def update_dataset(
     dataset_id: str,
     **fields: Any,
 ) -> dict[str, Any]:
-    """PUT /datasets/{datasetId}"""
-    return client.put(
+    """POST /datasets/{datasetId}"""
+    return client.post(
         "/datasets/{datasetId}",
         json=fields,
         datasetId=dataset_id,

src/ndi/cloud/api/documents.py

@@ -45,8 +45,8 @@ def update_document(
     document_id: str,
     doc_json: dict[str, Any],
 ) -> dict[str, Any]:
-    """PUT /datasets/{datasetId}/documents/{documentId}"""
-    return client.put(
+    """POST /datasets/{datasetId}/documents/{documentId}"""
+    return client.post(
         "/datasets/{datasetId}/documents/{documentId}",
         json=doc_json,
         datasetId=dataset_id,

tests/test_cloud_live.py

@@ -383,10 +383,8 @@ def test_update_dataset(self, client, fresh_dataset):
         from ndi.cloud.api.datasets import get_dataset, update_dataset
 
         new_name = "NDI_PYTEST_UPDATED_NAME"
-        # Retry on 404 too — MongoDB secondary reads may lag after creation
         _retry_on_server_error(
             lambda: update_dataset(client, fresh_dataset, name=new_name),
-            retry_on_404=True,
         )
 
         ds = get_dataset(client, fresh_dataset)
@@ -494,10 +492,8 @@ def test_update_document(self, client, fresh_dataset):
                 "document_class": {"class_name": "ndi_pytest_update"},
                 "base": {"name": "modified"},
             }
-            # Retry on 404 — MongoDB secondary reads may lag after add
             _retry_on_server_error(
                 lambda: update_document(client, fresh_dataset, doc_id, updated_json),
-                retry_on_404=True,
             )
             fetched = get_document(client, fresh_dataset, doc_id)
             assert fetched.get("base", {}).get("name") == "modified"