fix(update): make update.sh executable and fix Pulled grep pattern

- Add +x permission to update.sh (was causing systemd 203/EXEC failure)
- Remove $ anchor from grep so trailing space in docker output is matched
- Add .data/ to .gitignore

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -2,3 +2,4 @@
 .env
 *.sql
 *.log
+.data/

_update/update.sh

@@ -29,7 +29,7 @@ for stack_dir in "$STACKS_DIR"/*/; do
   cd "$stack_dir"
   pull_output=$(docker compose pull 2>&1 | tee -a "$LOG_FILE")
 
-  if echo "$pull_output" | grep -q " Pulled$"; then
+  if echo "$pull_output" | grep -q " Pulled"; then
     log "  Updates found — recreating containers"
     if docker compose up -d 2>&1 | tee -a "$LOG_FILE"; then
       updated+=("$stack")