fix: add ShellCheck disable directive for sourced file

- Add 'shellcheck disable=SC1091' directive before sourcing ratos-common.sh
- Suppresses warning about not following sourced files
- Placed immediately before the source command as per ShellCheck best practices
- Maintains code quality while acknowledging intentional sourcing pattern

Author: miklschmidt

configuration/scripts/klipper-fork-migration.sh

@@ -10,6 +10,7 @@ if [ ! -f "$SCRIPT_DIR/ratos-common.sh" ]; then
   echo "ERROR: ratos-common.sh not found in $SCRIPT_DIR"
   exit 1
 fi
+# shellcheck disable=SC1091
 source "$SCRIPT_DIR"/ratos-common.sh
 
 # Constants