Fix auth for 1.0.0: add logout endpoint, fix JWT claims consistency, add session revocation

go_cloud/internal/database/db.go

@@ -132,6 +132,15 @@ func (db *DB) GetSession(ctx context.Context, sessionID uuid.UUID) (*Session, er
 	return &session, nil
 }
 
+func (db *DB) RevokeSession(ctx context.Context, sessionID uuid.UUID) error {
+	_, err := db.ExecContext(ctx, `
+		UPDATE sessions
+		SET revoked_at = NOW()
+		WHERE id = $1 AND revoked_at IS NULL
+	`, sessionID)
+	return err
+}
+
 func (db *DB) GetUserOrganizations(ctx context.Context, userID uuid.UUID) ([]Organization, error) {
 	rows, err := db.QueryContext(ctx, `
 		SELECT o.id, o.name, o.slug, o.created_at