Add human-led conversation learning loop

tests/growth-repository.test.ts

@@ -513,7 +513,8 @@ describe('growth migration', () => {
     db.exec('DROP TABLE account_growth_comments');
     db.exec('DROP TABLE account_growth_subreddits');
     db.exec('DROP TABLE account_growth_settings');
-    db.pragma(`user_version = ${version - GROWTH_MIGRATION_COUNT}`);
+    // Also rewind the later conversation-learning migration.
+    db.pragma(`user_version = ${version - GROWTH_MIGRATION_COUNT - 1}`);
   }
 
   it('upgrades a database created before growth existed', () => {
@@ -539,8 +540,9 @@ describe('growth migration', () => {
     const version = db.pragma('user_version', { simple: true }) as number;
     db.exec('ALTER TABLE account_growth_settings DROP COLUMN daily_limit');
     // Rewind the daily-limit migration and every browsing migration that now
-    // follows it so the upgrade replays against the old growth row shape.
-    db.pragma(`user_version = ${version - 6}`);
+    // follows it, plus conversation learning, so the upgrade replays against
+    // the old growth row shape.
+    db.pragma(`user_version = ${version - 7}`);
     insertAccount(db, ACCOUNT);
     // Seed a row with the old shape so the upgrade runs against real data.
     db.prepare(`