v0.1.2: Multi-server architecture + security cleanup

- Implement multi-server Traefik + Sablier architecture
- Add label-based automatic service discovery
- Create separate Sablier stack deployment
- Add remote server deployment workflow (Option 3)
- Add 9 new functions for multi-server management
- Remove deprecated config-templates folder
- Replace hardcoded private data with placeholders
- Update backup timestamp format to YY_MM_DD_hh_mm
- Add markup.yml to .gitignore

Breaking changes:
- Removed Sablier from core docker-compose.yml (now separate stack)
- Config templates moved from config-templates/ to docker-compose/core/
- REQUIRED_VARS now dynamic based on deployment type

.gitignore

@@ -36,6 +36,9 @@ tmp/
 temp/
 *.tmp
 
+# Test/debug files with hardcoded values
+markup.yml
+
 # Docker volumes (if locally mounted)
 volumes/