fix: Resolve unclosed client session warning.

PiperOrigin-RevId: 813877780

Author: jscud

google/genai/_api_client.py

@@ -528,7 +528,7 @@ def __del__(self) -> None:
     except Exception:
       pass
     try:
-      asyncio.get_running_loop().run_until_complete(self.aclose())
+      asyncio.get_running_loop().create_task(self.aclose())
     except Exception:
       pass
 
@@ -1789,7 +1789,6 @@ def __del__(self) -> None:
       pass
 
     try:
-      asyncio.get_running_loop().run_until_complete(self.aclose())
+      asyncio.get_running_loop().create_task(self.aclose())
     except Exception:  # pylint: disable=broad-except
-      pass
-
+      pass

google/genai/client.py

@@ -127,7 +127,7 @@ async def __aexit__(
 
   def __del__(self) -> None:
     try:
-      asyncio.get_running_loop().run_until_complete(self.aclose())
+      asyncio.get_running_loop().create_task(self.aclose())
     except Exception:
       pass
 
@@ -398,4 +398,3 @@ def __exit__(
 
   def __del__(self) -> None:
     self.close()
-