Restructure repo: move chart to hades/ and include MySQL subchart

- Moved helm/hades/* to hades/ to match ArgoCD path: hades
- Included mysql-1.6.9.tgz subchart for ArgoCD dependency resolution
- Fixed sync wave ordering: dbinit wave 0, deployment wave 1

.gitignore

@@ -28,8 +28,8 @@ Thumbs.db
 *~
 
 # Helm
-*.tgz
-charts/*.tgz
+# *.tgz  # Commented to allow subchart archives for ArgoCD
+# charts/*.tgz
 
 # Environment
 .env