feat(auth): organization units, tenancy, roles and scopes for team access (#2919)

Co-authored-by: Kandev Agent <agent@kandev.dev>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

apps/backend/internal/task/repository/sqlite/base_migrations.go

@@ -60,6 +60,9 @@ func (r *Repository) runMigrations() error {
 	if err := r.ensureRepositorySetsSchema(); err != nil {
 		return err
 	}
+	if err := r.ensureTeamAccessSchema(); err != nil {
+		return err
+	}
 	if err := r.ensureRepositoryBranchPoliciesSchema(); err != nil {
 		return err
 	}