FrameSerializer: subclass from BaseObject so we can add events

changelog/3560.changed.md

@@ -0,0 +1 @@
+- `FrameSerializer` now subclasses from `BaseObject` to enable event support.

src/pipecat/serializers/base_serializer.py

@@ -9,9 +9,10 @@
 from abc import ABC, abstractmethod
 
 from pipecat.frames.frames import Frame, StartFrame
+from pipecat.utils.base_object import BaseObject
 
 
-class FrameSerializer(ABC):
+class FrameSerializer(BaseObject):
     """Abstract base class for frame serialization implementations.
 
     Defines the interface for converting frames to/from serialized formats