fix(OPEN-11891): satisfy pyright in both lint environments

CI's lint env has neither google-genai nor google-adk installed, so
`from google import genai` resolves to an unknown attribute on the
`google` namespace package (reportMissingTypeStubs +
reportAttributeAccessIssue). Locally, where the package IS installed,
pyright instead flags `inference_id` as an undeclared kwarg on
generate_content -- which is the point, since the tracer pops it before
calling through.

Suppress those three at file level in both new test files, and fix a
genuine typing slip: the async streaming comprehension yielded
list[str | None] against a List[str] annotation.

Verified against a venv with no google-* packages (matching CI) as well
as the local env with both installed: 0 errors either way, and no
pyright errors attributable to the new files repo-wide.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A8GauFiK5edFUfGnbjJrtz

Author: viniciusdsmello

tests/test_google_genai_adk_dedup.py

@@ -16,7 +16,10 @@
 class-init patch, so ADK's real call path is exercised end to end.
 """
 
+# Neither google-adk nor google-genai is installed in the lint env, so imports
+# from the `google` namespace package don't resolve there.
 # pyright: reportMissingImports=false, reportUnknownMemberType=false, reportUnknownVariableType=false, reportUnknownArgumentType=false, reportUnknownParameterType=false, reportMissingParameterType=false, reportUnusedFunction=false
+# pyright: reportMissingTypeStubs=false, reportAttributeAccessIssue=false, reportCallIssue=false
 
 import asyncio
 from typing import Any, Dict, List

tests/test_google_genai_integration.py

@@ -11,8 +11,12 @@
 """
 
 # google-genai isn't installed in the lint env, and pytest fixtures hide autouse
-# functions from static analysis.
+# functions from static analysis. The last two matter in BOTH directions: without
+# the package, `from google import genai` is an unresolved attribute on a
+# namespace package; with it, `inference_id` is an extra kwarg the SDK's own
+# signature doesn't declare (that's the whole point -- the tracer pops it).
 # pyright: reportMissingImports=false, reportUnknownMemberType=false, reportUnknownVariableType=false, reportUnknownArgumentType=false, reportUnknownParameterType=false, reportMissingParameterType=false, reportUnusedFunction=false
+# pyright: reportMissingTypeStubs=false, reportAttributeAccessIssue=false, reportCallIssue=false
 
 import asyncio
 import contextvars
@@ -291,7 +295,7 @@ def test_streaming_async_is_await_then_async_for(self) -> None:
 
         async def _drive() -> List[str]:
             stream = await client.aio.models.generate_content_stream(model="gemini-2.5-flash", contents="hi")
-            return [chunk.text async for chunk in stream]
+            return [chunk.text async for chunk in stream if chunk.text]
 
         with patch.object(gg, "add_to_trace") as mock_add:
             texts = asyncio.run(_drive())