[CM-8933] introduce empty flush method for the llm sdk (#98)

* Add flush method

* Fix lint errors

src/comet_llm/__init__.py

@@ -18,7 +18,7 @@
 if config.comet_disabled():
     from .dummy_api import Span, end_chain, log_prompt, start_chain  # type: ignore
 else:
-    from .api import log_user_feedback
+    from .api import flush, log_user_feedback
     from .chains.api import end_chain, start_chain
     from .chains.span import Span
     from .prompts.api import log_prompt
@@ -32,6 +32,7 @@
     "init",
     "is_ready",
     "log_user_feedback",
+    "flush",
 ]
 
 logging.setup()

src/comet_llm/api.py

@@ -50,3 +50,8 @@ def log_user_feedback(id: str, score: float, api_key: Optional[str] = None) -> N
     )
 
     experiment_api.log_metric("user_feedback", score)
+
+
+def flush() -> None:
+    """Flush all data to Comet platform."""
+    pass