test(client): align 3 schema-forwarded assertions to auto-wrapped {fields: …} body

## Purpose

After a8bde7e made _normalize_schema auto-wrap bare schema dicts in a
'fields' key, the unit-side assertions were aligned in 3a668b8 but
three integration tests in test_client.py were missed.

## Solution

Updated the final assertion in each of the three schema-forwarding
integration tests to expect the wrapped form
{"fields": {"text_field": {"type": "str"}}} instead of the bare form.
The SDK now sends {schema: {fields: {…}}} on the wire; tests must expect
the wrapped form. Fixes CI-0038.

Author: jhamon

tests/integration/test_client.py

@@ -128,7 +128,7 @@ def test_create_index_schema_parameter_forwarded() -> None:
     assert result.name == "test-schema-shim"
     sent_body = json.loads(route.calls[0].request.content)
     # schema is forwarded into spec.serverless.schema by build_create_body
-    assert sent_body["spec"]["serverless"]["schema"] == {"text_field": {"type": "str"}}
+    assert sent_body["spec"]["serverless"]["schema"] == {"fields": {"text_field": {"type": "str"}}}
 
 
 @respx.mock
@@ -227,7 +227,7 @@ def test_create_byoc_index_spec_schema_forwarded() -> None:
     )
 
     sent_body = json.loads(route.calls[0].request.content)
-    assert sent_body["spec"]["byoc"]["schema"] == {"genre": {"type": "str"}}
+    assert sent_body["spec"]["byoc"]["schema"] == {"fields": {"genre": {"type": "str"}}}
 
 
 @respx.mock
@@ -251,7 +251,7 @@ def test_create_byoc_index_method_schema_forwarded() -> None:
     )
 
     sent_body = json.loads(route.calls[0].request.content)
-    assert sent_body["spec"]["byoc"]["schema"] == {"genre": {"type": "str"}}
+    assert sent_body["spec"]["byoc"]["schema"] == {"fields": {"genre": {"type": "str"}}}
 
 
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