add FileData class events.py

src/pipecat/services/gemini_multimodal_live/events.py

@@ -29,6 +29,16 @@ class MediaChunk(BaseModel):
 class ContentPart(BaseModel):
     text: Optional[str] = Field(default=None, validate_default=False)
     inlineData: Optional[MediaChunk] = Field(default=None, validate_default=False)
+    fileData: Optional['FileData'] = Field(default=None, validate_default=False)
+
+
+class FileData(BaseModel):
+    """Represents a file reference in the Gemini File API."""
+    mimeType: str
+    fileUri: str
+
+
+ContentPart.model_rebuild()  # Rebuild model to resolve forward reference
 
 
 class Turn(BaseModel):