fix(genai/embeddings): defer async client init; wrap long comment for lint

Author: gns-x

libs/genai/langchain_google_genai/embeddings.py

@@ -117,7 +117,8 @@ def validate_environment(self) -> Self:
             transport=self.transport,
         )
         # Always defer async client initialization to first async call.
-        # This avoids creating event loops implicitly and aligns with lazy init in chat models.
+        # Avoids implicit event loop creation and aligns with lazy init
+        # in chat models.
         self.async_client = None
         return self