fix simulation reporting and research resilience

backend/app/models/agent.py

@@ -67,7 +67,7 @@ class LifeState(BaseModel):
     life_log: list[str] = Field(default_factory=list)
 
 
-class AgentPersona(BaseModel):
+class AgentPersona(BaseModel):
     id: int
     name: str
     role: str
@@ -88,4 +88,7 @@ class AgentPersona(BaseModel):
     knowledge_level: str = Field(default="full")
     life_state: LifeState | None = None
     abandoned_products: set[str] = Field(default_factory=set)
-    has_defected: bool = False
+    has_defected: bool = False
+    # Keeps degraded citizen generation observable without changing the
+    # existing persona contract. Normal LLM-generated citizens use "llm".
+    generation_source: str = "llm"