fix(engine): sync __version__ with pyproject.toml (2.1.0)

Author: abhinav-galileo

engine/src/agent_control_engine/__init__.py

@@ -9,7 +9,7 @@
     reset_evaluator_discovery,
 )
 
-__version__ = "0.1.0"
+__version__ = "2.1.0"
 
 __all__ = [
     "clear_evaluator_cache",