chore: enable pyupgrade fixes

Schema reflection code needed a minor adjustment to handle UnionTypes
and collections.abc.AsyncIterator. (Both are preferred for latest Python
releases.)

Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>

llama_stack/providers/inline/safety/prompt_guard/__init__.py

@@ -4,12 +4,12 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from typing import Any, Dict
+from typing import Any
 
-from .config import PromptGuardConfig  # noqa: F401
+from .config import PromptGuardConfig
 
 
-async def get_provider_impl(config: PromptGuardConfig, deps: Dict[str, Any]):
+async def get_provider_impl(config: PromptGuardConfig, deps: dict[str, Any]):
     from .prompt_guard import PromptGuardSafetyImpl
 
     impl = PromptGuardSafetyImpl(config, deps)

llama_stack/providers/inline/safety/prompt_guard/config.py

@@ -5,7 +5,7 @@
 # the root directory of this source tree.
 
 from enum import Enum
-from typing import Any, Dict
+from typing import Any
 
 from pydantic import BaseModel, field_validator
 
@@ -26,7 +26,7 @@ class PromptGuardConfig(BaseModel):
         return v
 
     @classmethod
-    def sample_run_config(cls, __distro_dir__: str, **kwargs: Any) -> Dict[str, Any]:
+    def sample_run_config(cls, __distro_dir__: str, **kwargs: Any) -> dict[str, Any]:
         return {
             "guard_type": "injection",
         }

llama_stack/providers/inline/safety/prompt_guard/prompt_guard.py

@@ -5,7 +5,7 @@
 # the root directory of this source tree.
 
 import logging
-from typing import Any, Dict, List
+from typing import Any
 
 import torch
 from transformers import AutoModelForSequenceClassification, AutoTokenizer
@@ -49,8 +49,8 @@ class PromptGuardSafetyImpl(Safety, ShieldsProtocolPrivate):
     async def run_shield(
         self,
         shield_id: str,
-        messages: List[Message],
-        params: Dict[str, Any] = None,
+        messages: list[Message],
+        params: dict[str, Any] = None,
     ) -> RunShieldResponse:
         shield = await self.shield_store.get_shield(shield_id)
         if not shield:
@@ -81,7 +81,7 @@ class PromptGuardShield:
         self.tokenizer = AutoTokenizer.from_pretrained(model_dir)
         self.model = AutoModelForSequenceClassification.from_pretrained(model_dir, device_map=self.device)
 
-    async def run(self, messages: List[Message]) -> RunShieldResponse:
+    async def run(self, messages: list[Message]) -> RunShieldResponse:
         message = messages[-1]
         text = interleaved_content_as_str(message.content)