Fix PHP 8.5 Docker build and address review feedback

- Bump Xdebug to 3.5.3 (3.4.2 does not support PHP 8.5, broke the build)
- Enable opcache/pgsql/pdo_mysql/pdo_pgsql after building them (Greptile P1)
- Pin base image to php:8.5.8-cli-alpine for reproducible builds (Greptile P2)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Meldiron

Dockerfile

@@ -12,11 +12,11 @@ RUN composer install \
     --no-scripts \
     --prefer-dist
 
-FROM php:8.5-cli-alpine AS compile
+FROM php:8.5.8-cli-alpine AS compile
 
 ENV PHP_REDIS_VERSION="6.3.0" \
     PHP_SWOOLE_VERSION="v6.1.6" \
-    PHP_XDEBUG_VERSION="3.4.2" \
+    PHP_XDEBUG_VERSION="3.5.3" \
     PHP_MONGODB_VERSION="2.3.3"
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
@@ -48,6 +48,7 @@ RUN apk update && apk add --no-cache \
  && for ext in opcache pgsql pdo_mysql pdo_pgsql; do \
       docker-php-ext-configure $ext && make -C /usr/src/php/ext/$ext -j$(nproc) && cp /usr/src/php/ext/$ext/modules/*.so $(php-config --extension-dir)/; \
     done \
+ && docker-php-ext-enable opcache pgsql pdo_mysql pdo_pgsql \
  && apk del libpq-dev \
  && rm -rf /var/cache/apk/*