Add build storage and backup scripts

- upload-release.sh: Upload artifacts to Hetzner Storage Box
- create-release.sh: Create Gitea releases with tag and artifacts
- post-deploy.sh: Auto-backup DB and upload after deploy
- setup-storagebox.sh: One-time storage box directory setup

scripts/setup-storagebox.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# Setup storage box directories and install SSH key
+# Run once when setting up storage box access
+set -euo pipefail
+
+REMOTE="u458763-sub3@u458763.your-storagebox.de"
+PORT=23
+PUBKEY=$(cat /home/devops/.ssh/id_ed25519.pub)
+
+echo "=== Storage Box Setup ==="
+echo "Remote: $REMOTE (port $PORT)"
+echo "Public key: $PUBKEY"
+echo
+
+# Test connection
+echo "Testing connection..."
+if sftp -P $PORT -oBatchMode=yes $REMOTE <<SFTP 2>/dev/null
+ls
+bye
+SFTP
+then
+    echo "Connection OK"
+else
+    echo "ERROR: Cannot connect to storage box"
+    echo "Please install the public key via Hetzner Robot panel:"
+    echo "  1. Login to https://robot.your-server.de"
+    echo "  2. Go to Storage Boxes -> u458763 -> Sub-accounts -> sub3"
+    echo "  3. Add SSH key: $PUBKEY"
+    exit 1
+fi
+
+# Create release directories
+echo "Creating release directories..."
+sftp -P $PORT -oBatchMode=yes $REMOTE <<SFTP
+mkdir releases
+mkdir releases/android
+mkdir releases/ios
+mkdir releases/web
+mkdir releases/backups
+bye
+SFTP
+
+echo "Storage box setup complete"
+echo "Directories: releases/{android,ios,web,backups}"