Add durable candidate funnel

tests/database.test.ts

@@ -107,7 +107,11 @@ describe('Database Client', () => {
         .prepare("SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%'")
         .all() as { name: string }[];
       // Existing domain/config tables plus account, conversation, sync and media ownership stores.
-      expect(tables.length).toBe(16);
+      expect(tables.length).toBe(18);
+      expect(tables.map((table) => table.name)).toEqual(expect.arrayContaining([
+        'candidate_queue',
+        'runtime_state',
+      ]));
     });
 
     it('tracks schema version and migrates a legacy sent_messages table transactionally', () => {
@@ -156,7 +160,7 @@ describe('Database Client', () => {
         DROP TABLE conversation_automation_claims;
         DROP TABLE ai_usage;
       `);
-      db.pragma(`user_version = ${latestVersion - 3}`);
+      db.pragma(`user_version = ${latestVersion - 4}`);
       runMigrations(db);
 
       expect(db.prepare('SELECT recipient, reason FROM recipient_suppressions ORDER BY recipient COLLATE NOCASE').all())