Close local release-quality gaps and reconcile workplan status

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a0e332-3365-77c0-8491-084e9ea33ac1

llm_connect/embedding_factory.py

@@ -2,7 +2,8 @@
 Factory for creating embedding adapters by provider name.
 """
 
-from typing import Optional, Any
+from collections.abc import Callable
+from typing import Any
 
 from llm_connect.embedding_adapter import EmbeddingAdapter
 from llm_connect.exceptions import LLMConfigurationError
@@ -15,8 +16,8 @@ _EMBEDDING_PROVIDERS = {
 
 def create_embedding_adapter(
     provider: str = "openai",
-    model: Optional[str] = None,
-    api_key: Optional[str] = None,
+    model: str | None = None,
+    api_key: str | None = None,
     **kwargs: Any,
 ) -> EmbeddingAdapter:
     """Instantiate an :class:`EmbeddingAdapter` for the given *provider*.
@@ -45,6 +46,6 @@ def create_embedding_adapter(
     module_path, class_name = fqn.rsplit(".", 1)
     import importlib
     mod = importlib.import_module(module_path)
-    cls = getattr(mod, class_name)
+    cls: Callable[..., EmbeddingAdapter] = getattr(mod, class_name)
 
     return cls(model=model, api_key=api_key, provider=provider, **kwargs)