feat(learner): Better Auth sessions, owner bootstrap, claim groups; server takes feature factories

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/feature-learner/src/index.ts

@@ -1 +1,2 @@
 export { migrationsDirs, runMigrations } from "./server/migrate";
+export { learnerFeature } from "./server/feature";