add known capabilities

Author: hannahwestra25

pyrit/prompt_target/common/target_capabilities.py

@@ -190,6 +190,7 @@ def get_known_capabilities(underlying_model: str) -> "Optional[TargetCapabilitie
     supports_multi_message_pieces=True,
     supports_system_prompt=True,
     supports_json_output=True,
+    supports_editable_history=True,
     input_modalities=_TEXT_IMAGE_INPUT,
     output_modalities=_TEXT_OUTPUT,
 )
@@ -200,6 +201,7 @@ def get_known_capabilities(underlying_model: str) -> "Optional[TargetCapabilitie
     supports_system_prompt=True,
     supports_json_schema=True,
     supports_json_output=True,
+    supports_editable_history=True,
     input_modalities=_TEXT_IMAGE_INPUT,
     output_modalities=_TEXT_OUTPUT,
 )