fix labels v2 - simpler approach

fix_labels_v2.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# 直接一行命令，不用heredoc，确保输出能捕获
+
+docker run --rm --privileged --pid=host alpine nsenter -t 1 -m -u -n -i sh -c '
+echo "=== DB EXISTS? ==="
+ls -la /var/lib/gitea/data/gitea.db
+
+echo "=== RUNNER COUNT ==="
+sqlite3 /var/lib/gitea/data/gitea.db "SELECT count(*) FROM action_runner;"
+
+echo "=== CURRENT LABELS ==="
+sqlite3 /var/lib/gitea/data/gitea.db "SELECT id, name, agent_labels FROM action_runner WHERE status=0 ORDER BY id;"
+
+echo "=== ADDING LABEL ==="
+sqlite3 /var/lib/gitea/data/gitea.db "
+UPDATE action_runner
+SET agent_labels = json_insert(agent_labels, '\$[#]', 'ubuntu-22.04')
+WHERE status = 0;
+"
+echo "Update done, rows affected: $?"
+
+echo "=== VERIFY ==="
+sqlite3 /var/lib/gitea/data/gitea.db "SELECT id, name, agent_labels FROM action_runner WHERE status=0 ORDER BY id;"
+
+echo "=== DONE ==="
+'