fix(#1953): route approval helper-events to the submitter, not the root agent

hive-c0re/src/coordinator.rs

@@ -1295,6 +1295,20 @@ impl Coordinator {
         self.notify_agent(hive_sh4re::MANAGER_AGENT, event);
     }
 
+    /// Route an approval-scoped helper event to the agent that submitted
+    /// approval `approval_id` (the authenticated socket caller at submit
+    /// time). Legacy rows with no recorded submitter — and any lookup
+    /// failure — fall back to the root agent, preserving the prior
+    /// always-root behaviour.
+    pub fn notify_submitter(&self, approval_id: i64, event: &hive_sh4re::HelperEvent) {
+        let target = self
+            .approvals
+            .submitter_of(approval_id)
+            .unwrap_or_default()
+            .unwrap_or_else(|| hive_sh4re::MANAGER_AGENT.to_owned());
+        self.notify_agent(&target, event);
+    }
+
     /// Push a `HelperEvent` into an arbitrary agent's inbox. Encoded
     /// the same way as `notify_manager` (sender = `SYSTEM_SENDER`,
     /// body = JSON-encoded event). Used to route `QuestionAnswered`