fix: improve cross-device evidence, request diagnostics and prompt efficiency

artemis/plugins/models.py

@@ -214,6 +214,7 @@ class PluginCallResult(PluginModel):
     tool: str = ""
     image_names: list[str] = Field(default_factory=list)
     call_id: str = ""
+    text_ref: str = ""
     source: EvidenceSource | None = None
     source_id: str = ""
     error_code: str = ""