Dynamic vision chat (#22551)

* Improve live context image handling

* Improve chat handling

* Cleanup

frigate/api/defs/request/chat_body.py

@@ -32,13 +32,6 @@ class ChatCompletionRequest(BaseModel):
         le=10,
         description="Maximum number of tool call iterations (default: 5)",
     )
-    include_live_image: Optional[str] = Field(
-        default=None,
-        description=(
-            "If set, the current live frame from this camera is attached to the first "
-            "user message as multimodal content. Use with get_live_context for detection info."
-        ),
-    )
     stream: bool = Field(
         default=False,
         description="If true, stream the final assistant response in the body as newline-delimited JSON.",