fix(entrypoint): graceful docker stop + cac-fpm error_log owner on first start

Graceful stop (cac, cac-fpm, shared-httpd, and form-sender which runs cac):
entrypoint.sh, entrypoint-fpm.sh and entrypoint-shared-httpd.sh end with bash
as PID 1 tailing logs. PID 1 only receives signals it has a handler for, so
docker stop's SIGTERM was dropped; docker waited the full 10s and SIGKILLed
apache / php-fpm mid-request (exit 137). The entrypoints now trap TERM/INT and
stop each daemon they started via the new scripts/stop-services.sh: httpd
graceful-stop (WINCH), php-fpm QUIT, crond TERM, each with a bounded wait and a
TERM/KILL fallback, budgets summing to < 10s, then exit 0. The log tail is
backgrounded + `wait`ed (and shared-httpd's 60s rescan sleep likewise) so the
trap runs immediately. Log streaming to docker logs is unchanged.

cac-fpm error_log: entrypoint-fpm.sh `touch`ed logs/php-fpm/error.log as root
AFTER its chown -R, so on a site's first start the pool (customer uid) could
not open it and PHP errors went out as FastCGI stderr to shared-httpd's log
until the next restart. The file is now created and chowned to the customer
right after the logs dir is made, before php-fpm starts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/entrypoint-fpm.sh

@@ -16,6 +16,14 @@ adduser -u $uid $user
 
 mkdir -p /home/$user/public_html
 mkdir -p /home/$user/logs/php-fpm
+# Create the pool's error_log (php_admin_value[error_log] in
+# create-php-config.sh) BEFORE the chown -R below, and chown it explicitly.
+# It used to be `touch`ed as root at the very end, after the chown, so on a
+# site's first start the pool (customer uid) could not open it and PHP errors
+# fell back to FastCGI stderr -> shared-httpd's error log until the next
+# restart's chown -R fixed the owner.
+touch /home/$user/logs/php-fpm/error.log
+chown $user:$user /home/$user/logs/php-fpm/error.log
 
 ln -sf /home/$user/logs/php-fpm /var/log/php-fpm
 
@@ -89,8 +97,26 @@ crontab -u $user /home/$user/crontab
 
 /usr/sbin/crond
 
-# Tail PHP-FPM logs (becomes PID 1 process)
-touch /home/$user/logs/php-fpm/error.log
-tail -f /home/$user/logs/php-fpm/*
+# Graceful shutdown. bash is PID 1 here, and PID 1 only receives signals it
+# has a handler for, so without this trap `docker stop`'s SIGTERM was dropped:
+# docker waited the full 10s and SIGKILLed php-fpm mid-request (exit 137).
+# php-fpm QUIT = graceful (workers finish their current request), then crond.
+source /scripts/stop-services.sh
+TAIL_PID=""
+shutdown() {
+  trap - TERM INT
+  echo "entrypoint: received stop signal, shutting down"
+  stop_service php-fpm /run/php-fpm/php-fpm.pid QUIT 6 'php-fpm: master'
+  stop_service crond /run/crond.pid TERM 1 '^/usr/sbin/crond'
+  [ -n "$TAIL_PID" ] && kill "$TAIL_PID" 2>/dev/null
+  exit 0
+}
+trap shutdown TERM INT
+
+# Tail PHP-FPM logs to docker logs. Backgrounded + `wait` (instead of a
+# foreground tail) so bash can run the trap as soon as a signal arrives.
+tail -f /home/$user/logs/php-fpm/* &
+TAIL_PID=$!
+wait "$TAIL_PID"
 
 exit 0