paired: preserve prior owner and reviewer finals across superseded tasks

src/db/paired-state.ts

@@ -254,6 +254,26 @@ export function getLatestOpenPairedTaskForChatFromDatabase(
   return row ? hydratePairedTaskRow(database, row) : undefined;
 }
 
+export function getLatestPreviousPairedTaskForChatFromDatabase(
+  database: Database,
+  chatJid: string,
+  currentTaskId: string,
+): PairedTask | undefined {
+  const row = database
+    .prepare(
+      `
+        SELECT *
+          FROM paired_tasks
+         WHERE chat_jid = ?
+           AND id != ?
+         ORDER BY updated_at DESC, created_at DESC
+         LIMIT 1
+      `,
+    )
+    .get(chatJid, currentTaskId) as StoredPairedTaskRow | undefined;
+  return row ? hydratePairedTaskRow(database, row) : undefined;
+}
+
 export function updatePairedTaskInDatabase(
   database: Database,
   id: string,

src/db/runtime-paired.ts

@@ -26,6 +26,7 @@ import {
   createPairedTaskInDatabase,
   getLastBotFinalMessageFromDatabase,
   getLatestOpenPairedTaskForChatFromDatabase,
+  getLatestPreviousPairedTaskForChatFromDatabase,
   getLatestPairedTaskForChatFromDatabase,
   getPairedProjectFromDatabase,
   getPairedTaskByIdFromDatabase,
@@ -101,6 +102,17 @@ export function getLatestOpenPairedTaskForChat(
   return getLatestOpenPairedTaskForChatFromDatabase(requireDatabase(), chatJid);
 }
 
+export function getLatestPreviousPairedTaskForChat(
+  chatJid: string,
+  currentTaskId: string,
+): PairedTask | undefined {
+  return getLatestPreviousPairedTaskForChatFromDatabase(
+    requireDatabase(),
+    chatJid,
+    currentTaskId,
+  );
+}
+
 export function updatePairedTask(id: string, updates: PairedTaskUpdates): void {
   updatePairedTaskInDatabase(requireDatabase(), id, updates);
 }