fix(mypy): resolve type errors in public_endpoints, user_api_key_auth, common_utils, transformation

- public_endpoints.py: fix _cached_endpoints type annotation
- user_api_key_auth.py: accept Optional[str] for end_user_id parameter
- common_utils.py: add NewProjectRequest/UpdateProjectRequest to Union type
- transformation.py: add ChatCompletionRedactedThinkingBlock and list[Any] to content type

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

litellm/completion_extras/litellm_responses_transformation/transformation.py

@@ -49,6 +49,7 @@ if TYPE_CHECKING:
         ALL_RESPONSES_API_TOOL_PARAMS,
         AllMessageValues,
         ChatCompletionImageObject,
+        ChatCompletionRedactedThinkingBlock,
         ChatCompletionThinkingBlock,
         OpenAIMessageContentListBlock,
     )
@@ -579,7 +580,8 @@ class LiteLLMResponsesTransformationHandler(CompletionTransformationBridge):
         content: Optional[
             Union[
                 str,
-                Iterable[Union["OpenAIMessageContentListBlock", "ChatCompletionThinkingBlock"]],
+                List[Any],
+                Iterable[Union["OpenAIMessageContentListBlock", "ChatCompletionThinkingBlock", "ChatCompletionRedactedThinkingBlock"]],
             ]
         ],
         role: str,

litellm/proxy/auth/user_api_key_auth.py

@@ -164,7 +164,7 @@ def _get_bearer_token(
 def _apply_budget_limits_to_end_user_params(
     end_user_params: dict,
     budget_info: LiteLLM_BudgetTable,
-    end_user_id: str,
+    end_user_id: Optional[str],
 ) -> None:
     """
     Helper function to apply budget limits to end user parameters.

litellm/proxy/management_endpoints/common_utils.py

@@ -16,6 +16,7 @@ from litellm.proxy._types import (
 from litellm.proxy.utils import _premium_user_check
 
 if TYPE_CHECKING:
+    from litellm.proxy._types import NewProjectRequest, UpdateProjectRequest
     from litellm.proxy.utils import PrismaClient, ProxyLogging
 
 
@@ -283,6 +284,8 @@ def _set_object_metadata_field(
         KeyRequestBase,
         LiteLLM_OrganizationTable,
         LiteLLM_ProjectTable,
+        "NewProjectRequest",
+        "UpdateProjectRequest",
     ],
     field_name: str,
     value: Any,

litellm/proxy/public_endpoints/public_endpoints.py

@@ -76,7 +76,7 @@ _ENDPOINT_METADATA: Dict[str, Dict[str, str]] = {
 _SLUG_SUFFIX_RE = re.compile(r"\s*\(`[^`]+`\)\s*$")
 
 # Loaded once on first request; never invalidated (local file, no TTL needed).
-_cached_endpoints: Optional[List[Dict[str, Any]]] = None
+_cached_endpoints: Optional[SupportedEndpointsResponse] = None
 
 
 def _clean_display_name(raw: str) -> str: