Migrate to alo organization

Update all registry paths from ppetru/* to alo/* and workflow
references from ppetru/alo-cluster to alo/alo-cluster.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/igsync.hcl

@@ -13,7 +13,7 @@ job "igsync" {
       driver = "docker"
 
       config {
-        image = "gitea.v.paler.net/ppetru/igsync:latest"
+        image = "gitea.v.paler.net/alo/igsync:latest"
 
         # Mount the data directory for .env, database, and media files
         volumes = [