chore: gitignore module asset symlinks (runtime-generated)

web/modules/* symlinks point to absolute Docker container paths
(/var/www/modules/*/web) and are regenerated by module:assets-sync.
They should not be tracked — they break on fresh clones and are
machine-specific.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -18,6 +18,7 @@ config/config.php
 !/.agents/runs/.gitkeep
 
 # Runtime & generated
+/web/modules/
 /web/debugger/
 /data/
 /storage/*