feat: expose to_strict_json_schema as public API (#2093)

Expose the internal to_strict_json_schema function as a public API
so users can generate strict JSON schemas from Pydantic models
without relying on private module paths.

Changes:
- Add to_strict_json_schema export to openai.lib.__init__
- Add to_strict_json_schema export to openai.__init__
- Add test for public API accessibility

Closes #2093

Author: lrg913427-dot

src/openai/__init__.py

@@ -96,7 +96,7 @@
 if not _t.TYPE_CHECKING:
     from ._utils._resources_proxy import resources as resources
 
-from .lib import azure as _azure, pydantic_function_tool as pydantic_function_tool
+from .lib import azure as _azure, pydantic_function_tool as pydantic_function_tool, to_strict_json_schema as to_strict_json_schema
 from .version import VERSION as VERSION
 from .lib.azure import AzureOpenAI as AzureOpenAI, AsyncAzureOpenAI as AsyncAzureOpenAI
 from .lib._old_api import *

src/openai/lib/__init__.py

@@ -1,2 +1,3 @@
 from ._tools import pydantic_function_tool as pydantic_function_tool
+from ._pydantic import to_strict_json_schema as to_strict_json_schema
 from ._parsing import ResponseFormatT as ResponseFormatT

tests/lib/test_pydantic.py

@@ -12,6 +12,11 @@
 from .schema_types.query import Query
 
 
+def test_to_strict_json_schema_public_api() -> None:
+    """Test that to_strict_json_schema is accessible as a public API via openai.to_strict_json_schema."""
+    assert openai.to_strict_json_schema is to_strict_json_schema
+
+
 def test_most_types() -> None:
     if not PYDANTIC_V1:
         assert openai.pydantic_function_tool(Query)["function"] == snapshot(