fix(#1940): carry pr_number on the live approval_added event

hive-c0re/src/coordinator.rs

@@ -389,6 +389,20 @@ pub struct ApprovalResolved<'a> {
     pub description: Option<String>,
 }
 
+/// Field-named payload for [`Coordinator::emit_approval_added`].
+/// Mirrors the `ApprovalAdded` dashboard-event fields. `agent`
+/// borrows from the caller; `approval_kind` is a compile-time
+/// constant. `pr_number` is set for `merge_config_pr` only.
+pub struct ApprovalAdded<'a> {
+    pub id: i64,
+    pub agent: &'a str,
+    pub approval_kind: &'static str,
+    pub sha_short: Option<String>,
+    pub diff: Option<String>,
+    pub description: Option<String>,
+    pub pr_number: Option<u64>,
+}
+
 /// Field-named payload for [`Coordinator::emit_question_added`].
 /// Mirrors the `QuestionAdded` dashboard-event fields; all references
 /// share the caller's lifetime.
@@ -740,15 +754,16 @@ impl Coordinator {
     /// Emit `ApprovalAdded` immediately after the row is inserted in
     /// sqlite. Caller passes the diff text it already computed (or
     /// `None` for spawn approvals which carry no diff).
-    pub fn emit_approval_added(
-        &self,
-        id: i64,
-        agent: &str,
-        approval_kind: &'static str,
-        sha_short: Option<String>,
-        diff: Option<String>,
-        description: Option<String>,
-    ) {
+    pub fn emit_approval_added(&self, ev: ApprovalAdded<'_>) {
+        let ApprovalAdded {
+            id,
+            agent,
+            approval_kind,
+            sha_short,
+            diff,
+            description,
+            pr_number,
+        } = ev;
         self.emit_dashboard_event(DashboardEvent::ApprovalAdded {
             seq: self.next_seq(),
             id,
@@ -757,6 +772,7 @@ impl Coordinator {
             sha_short,
             diff,
             description,
+            pr_number,
         });
     }