feat: preserve automation actor provenance

src/govoplan_dataflow/backend/schemas.py

@@ -429,6 +429,16 @@ class DataflowTriggerDeliveryListResponse(BaseModel):
     deliveries: list[DataflowTriggerDeliveryResponse]
 
 
+class DataflowEventActor(BaseModel):
+    type: str = Field(
+        min_length=1,
+        max_length=100,
+        pattern=r"^[A-Za-z0-9_.:-]+$",
+    )
+    id: str | None = Field(default=None, max_length=255)
+    label: str | None = Field(default=None, max_length=300)
+
+
 class DataflowEventDeliveryRequest(BaseModel):
     event_id: str = Field(min_length=1, max_length=128)
     type: str = Field(
@@ -445,6 +455,7 @@ class DataflowEventDeliveryRequest(BaseModel):
     occurred_at: datetime
     correlation_id: str | None = Field(default=None, max_length=128)
     causation_id: str | None = Field(default=None, max_length=128)
+    actor: DataflowEventActor | None = None
     classification: Literal[
         "public",
         "internal",