Run SMW rebuildData.php in background to avoid blocking startup

On large wikis, rebuildData.php can take a very long time. Running it
synchronously blocks the entire container startup: the web server, log
permission setup, and php-fpm never start, leaving the site completely
down with no maintenance banner.

Wrap the rebuildData block in a background subshell so services start
immediately. The .maintenance flag already provides a maintenance banner
while background tasks complete.

Fixes #91

Author: cicalese

_sources/scripts/run-all.sh

@@ -176,6 +176,8 @@ if [ -n "$MW_SECRET_KEY" ] || [ -e "$MW_VOLUME/config/LocalSettings.php" ] || [
   # Rebuild Semantic MediaWiki data for any wikis that were just set up.
   # setupStore.php (run by update.php hooks) creates tables but does not
   # populate them — rebuildData.php is needed for Special:Browse etc.
+  # Run in background to avoid blocking container startup on large wikis.
+  (
   if [ -f "$MW_HOME/extensions/SemanticMediaWiki/extension.json" ]; then
     wiki_ids=$(get_wiki_ids)
     if [ -n "$wiki_ids" ]; then
@@ -197,6 +199,7 @@ if [ -n "$MW_SECRET_KEY" ] || [ -e "$MW_VOLUME/config/LocalSettings.php" ] || [
       fi
     fi
   fi
+  ) &
 fi
 
 # Configure Apache rewrites for path-based wikis (e.g., localhost/wiki2)