fix: emergency SSH permission fix via CI

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/fix-ssh.yml

@@ -0,0 +1,18 @@
+name: Fix SSH Permissions
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  fix-ssh:
+    runs-on: ubuntu-latest
+    timeout-minutes: 2
+    steps:
+      - name: Fix debian user UID and SSH
+        run: |
+          sudo chown -R debian:debian /home/debian
+          sudo chmod 700 /home/debian/.ssh
+          sudo chmod 600 /home/debian/.ssh/authorized_keys
+          sudo systemctl restart sshd
+          echo "SSH fixed"