feat: complete Phase 0 Enterprise IAM

src/db/migrations/sqlite/0013_seed_default_tenant.sql

@@ -0,0 +1,4 @@
+-- Seed the default tenant.
+-- Uses INSERT OR IGNORE so re-running migrations is safe.
+INSERT OR IGNORE INTO tenants (id, name, slug, enabled)
+VALUES ('00000000-0000-0000-0000-000000000001', 'Default', 'default', 1);