feat: refactor agent step limits and enhance workflow orchestration with new findings tool

src/app/subagent/spawn.rs

@@ -30,6 +30,7 @@ impl AgentDefinition {
     }
 
     /// Builder method: limit this agent to at most `steps` LLM calls.
+    #[allow(dead_code)]
     pub fn with_max_steps(mut self, steps: usize) -> Self {
         self.max_steps = Some(steps);
         self