Use toolkit downloads folder instead of /tmp or /root

Better approach per user suggestion:
- Downloads to: /root/server-toolkit/downloads/acronis-install-YYYYMMDD-HHMMSS/
- Keeps toolkit directory organized
- Avoids polluting /root
- Avoids /tmp noexec issues
- Added downloads/ to .gitignore
- Cleanup removes timestamped installation directory after completion

Benefits:
- All downloads in one place
- Easy to find if debugging needed
- Cleaner than scattered in /root
- Still allows execution (not in /tmp)

.gitignore

@@ -54,3 +54,4 @@ id_ed25519.pub
 # Config files that might contain sensitive data
 config.local.*
 *.credentials
+downloads/

modules/backup/acronis-install.sh

@@ -226,10 +226,15 @@ echo ""
 echo -e "${BOLD}Starting Installation...${NC}"
 echo ""
 
-# Create temp directory (not in /tmp as it may have noexec)
-TEMP_DIR="/root/acronis-install-$$"
-mkdir -p "$TEMP_DIR"
-cd "$TEMP_DIR" || exit 1
+# Create download directory in toolkit folder
+DOWNLOAD_DIR="$SCRIPT_DIR/downloads"
+mkdir -p "$DOWNLOAD_DIR"
+cd "$DOWNLOAD_DIR" || exit 1
+
+# Use timestamped subdirectory for this installation
+INSTALL_DIR="$DOWNLOAD_DIR/acronis-install-$(date +%Y%m%d-%H%M%S)"
+mkdir -p "$INSTALL_DIR"
+cd "$INSTALL_DIR" || exit 1
 
 # Download installer
 echo "→ Downloading Acronis agent installer..."
@@ -348,9 +353,9 @@ else
 fi
 
 # Cleanup
-echo "→ Cleaning up temporary files..."
-cd /
-rm -rf "$TEMP_DIR"
+echo "→ Cleaning up installation files..."
+cd "$SCRIPT_DIR"
+rm -rf "$INSTALL_DIR"
 
 echo ""
 press_enter