fix: remove php8.5-pcntl and php8.5-sodium from workflow installations

- pcntl and sodium are built-in in PHP 8.5, no separate packages needed
- These extensions are part of php8.5-cli/core and don't need separate installation
- Fixes 'Unable to locate package' errors in workflow setup

.gitea/workflows/security-scan.yml

@@ -52,6 +52,7 @@ jobs:
           apt-get update
           
           # Install PHP 8.5 (matches composer.json requirement ^8.5 and Dockerfiles)
+          # Note: pcntl and sodium are built-in in PHP 8.5, no separate packages needed
           apt-get install -y \
             php8.5 \
             php8.5-cli \
@@ -60,7 +61,6 @@ jobs:
             php8.5-xml \
             php8.5-mbstring \
             php8.5-zip \
-            php8.5-pcntl \
             php8.5-pdo \
             php8.5-pdo-sqlite \
             php8.5-bcmath \
@@ -69,7 +69,6 @@ jobs:
             php8.5-gd \
             php8.5-exif \
             php8.5-iconv \
-            php8.5-sodium \
             composer
 
       - name: Validate composer.json and composer.lock