fix(assets): address bot review comments

- Soften offset param prose: it's not deprecated, just not preferred for
  sequential walks. Random-access UIs (jump-to-page, item count displays)
  legitimately still want offset, so dropping the 'deprecated' framing
  rather than promoting it to a machine-readable deprecated:true flag.
- Add explicit HTTP status assertions before every json() / next_cursor
  read in test_list_cursor.py so a failing request surfaces as an HTTP
  error instead of a confusing KeyError on a 4xx/5xx body.

openapi.yaml

@@ -1518,8 +1518,11 @@ paths:
             type: integer
             default: 0
           description: |
-            Deprecated in favor of `after` cursor pagination. When both are
-            supplied, `after` wins and `offset` is ignored.
+            Offset-based pagination. Cursor pagination via `after` is preferred
+            for sequential walks (stable across concurrent inserts/deletes) but
+            `offset` remains fully supported for random access (jump-to-page
+            UIs, "showing items X–Y of N" displays). When both are supplied,
+            `after` wins and `offset` is ignored.
         - name: after
           in: query
           schema:

tests-unit/assets_test/test_list_cursor.py

@@ -109,6 +109,7 @@ def test_cursor_wins_over_offset(http: requests.Session, api_base: str, asset_fa
         },
         timeout=120,
     )
+    assert r.status_code == 200, r.text
     cursor = r.json()["next_cursor"]
     assert cursor is not None
 
@@ -144,6 +145,7 @@ def test_next_cursor_absent_when_no_more_results(http: requests.Session, api_bas
         },
         timeout=120,
     )
+    assert r.status_code == 200, r.text
     body = r.json()
     assert body["has_more"] is False
     assert "next_cursor" not in body
@@ -159,6 +161,7 @@ def test_cursor_pagination_first_page_mints_cursor(http: requests.Session, api_b
         params={"include_tags": "unit-tests,cursor-first-page", "sort": "name", "order": "asc", "limit": "2"},
         timeout=120,
     )
+    assert r.status_code == 200, r.text
     body = r.json()
     assert body["has_more"] is True
     assert body.get("next_cursor"), "first page must mint a cursor when more rows exist"
@@ -175,6 +178,7 @@ def test_cursor_no_spurious_cursor_when_page_size_equals_remainder(http: request
         params={"include_tags": "unit-tests,cursor-exact-multiple", "sort": "name", "order": "asc", "limit": "2"},
         timeout=120,
     )
+    assert r.status_code == 200, r.text
     cursor = r.json()["next_cursor"]
     assert cursor is not None
     # Page 2 — should exhaust the set with no cursor for a phantom page 3
@@ -183,6 +187,7 @@ def test_cursor_no_spurious_cursor_when_page_size_equals_remainder(http: request
         params={"include_tags": "unit-tests,cursor-exact-multiple", "sort": "name", "order": "asc", "limit": "2", "after": cursor},
         timeout=120,
     )
+    assert r2.status_code == 200, r2.text
     body = r2.json()
     assert len(body["assets"]) == 2
     assert body["has_more"] is False
@@ -245,6 +250,7 @@ def test_cursor_order_mismatch_returns_400(http: requests.Session, api_base: str
         },
         timeout=120,
     )
+    assert r.status_code == 200, r.text
     cursor = r.json()["next_cursor"]
     assert cursor is not None
 
@@ -321,5 +327,6 @@ def test_cursor_pagination_stable_after_delete(http: requests.Session, api_base:
         },
         timeout=120,
     )
+    assert r2.status_code == 200, r2.text
     body2 = r2.json()
     assert [a["name"] for a in body2["assets"]] == names[2:]