Add sockets PHP extension

Required by php-amqplib/php-amqplib v3.1.0+ which is a dependency
of sylius/b2b-kit for RabbitMQ message queue support.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: Rafikooo

php/Dockerfile

@@ -47,6 +47,7 @@ RUN set -eux; \
 		gd \
 		intl \
 		pdo_mysql \
+		sockets \
 		zip \
 	; \
 	pecl install \