feat(flagpole): Add to_dict method to EvaluationContext (#72955)

Author: GabeVillalobos

src/flagpole/evaluation_context.py

@@ -73,6 +73,9 @@ def has(self, key: str) -> Any:
     def size(self) -> int:
         return len(self.__data)
 
+    def to_dict(self) -> EvaluationContextDict:
+        return deepcopy(self.__data)
+
 
 T_CONTEXT_DATA = TypeVar("T_CONTEXT_DATA")