Ignore issue with pydantic typing + other fixes

Author: sjmonson

src/guidellm/benchmark/scenario.py

@@ -1,7 +1,8 @@
 from pathlib import Path
-from typing import Any, Dict, Literal, Optional, Self, Union
+from typing import Any, Dict, Literal, Optional, Union
 
 from pydantic import Field
+from typing_extensions import Self
 
 from guidellm.backend import BackendType
 from guidellm.core import Serializable
@@ -17,7 +18,7 @@ class Scenario(Serializable):
     backend_kwargs: Optional[Dict[str, Any]] = None
     model: Optional[str] = None
     tokenizer: Optional[str] = None
-    data: Union[str, Dict[str, Any]] = Field(default_factory=dict)
+    data: Union[str, Dict[str, Any]] = Field(default_factory=dict)  # type: ignore[arg-type]
     data_type: Literal["emulated", "file", "transformers"] = "emulated"
     rate_type: ProfileGenerationMode = "sweep"
     rate: Optional[float] = None

src/guidellm/utils/cli_params.py

@@ -43,7 +43,7 @@ def __init__(self, *types: ParamType):
         self.types = types
         self.name = "".join(t.name for t in types)
 
-    def convert(self, value, param, ctx):
+    def convert(self, value, param, ctx) -> Any:
         fails = []
         for t in self.types:
             try: