chore: enable pyupgrade fixes (#1806)

# What does this PR do?

The goal of this PR is code base modernization.

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

Note to reviewers: almost all changes here are automatically generated
by pyupgrade. Some additional unused imports were cleaned up. The only
change worth of note can be found under `docs/openapi_generator` and
`llama_stack/strong_typing/schema.py` where reflection code was updated
to deal with "newer" types.

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

llama_stack/providers/inline/vector_io/faiss/__init__.py

@@ -4,14 +4,14 @@
 # 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 llama_stack.providers.datatypes import Api
 
 from .config import FaissVectorIOConfig
 
 
-async def get_provider_impl(config: FaissVectorIOConfig, deps: Dict[Api, Any]):
+async def get_provider_impl(config: FaissVectorIOConfig, deps: dict[Api, Any]):
     from .faiss import FaissVectorIOAdapter
 
     assert isinstance(config, FaissVectorIOConfig), f"Unexpected config type: {type(config)}"

llama_stack/providers/inline/vector_io/faiss/config.py

@@ -4,7 +4,7 @@
 # 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 pydantic import BaseModel
 
@@ -20,7 +20,7 @@ class FaissVectorIOConfig(BaseModel):
     kvstore: KVStoreConfig
 
     @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 {
             "kvstore": SqliteKVStoreConfig.sample_run_config(
                 __distro_dir__=__distro_dir__,

llama_stack/providers/inline/vector_io/faiss/faiss.py

@@ -9,7 +9,7 @@ import base64
 import io
 import json
 import logging
-from typing import Any, Dict, List, Optional
+from typing import Any
 
 import faiss
 import numpy as np
@@ -84,7 +84,7 @@ class FaissIndex(EmbeddingIndex):
 
         await self.kvstore.delete(f"{FAISS_INDEX_PREFIX}{self.bank_id}")
 
-    async def add_chunks(self, chunks: List[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
         # Add dimension check
         embedding_dim = embeddings.shape[1] if len(embeddings.shape) > 1 else embeddings.shape[0]
         if embedding_dim != self.index.d:
@@ -159,7 +159,7 @@ class FaissVectorIOAdapter(VectorIO, VectorDBsProtocolPrivate):
             inference_api=self.inference_api,
         )
 
-    async def list_vector_dbs(self) -> List[VectorDB]:
+    async def list_vector_dbs(self) -> list[VectorDB]:
         return [i.vector_db for i in self.cache.values()]
 
     async def unregister_vector_db(self, vector_db_id: str) -> None:
@@ -176,8 +176,8 @@ class FaissVectorIOAdapter(VectorIO, VectorDBsProtocolPrivate):
     async def insert_chunks(
         self,
         vector_db_id: str,
-        chunks: List[Chunk],
-        ttl_seconds: Optional[int] = None,
+        chunks: list[Chunk],
+        ttl_seconds: int | None = None,
     ) -> None:
         index = self.cache.get(vector_db_id)
         if index is None:
@@ -189,7 +189,7 @@ class FaissVectorIOAdapter(VectorIO, VectorDBsProtocolPrivate):
         self,
         vector_db_id: str,
         query: InterleavedContent,
-        params: Optional[Dict[str, Any]] = None,
+        params: dict[str, Any] | None = None,
     ) -> QueryChunksResponse:
         index = self.cache.get(vector_db_id)
         if index is None: