Deployment Redesign

Implemented the deployment redesign.
- Added Dockge-first-class stacks:
  - [stacks/infra/compose.yaml]
  - [stacks/caddy/compose.yaml]
- Added reusable business template: [deploy/business-compose.yaml.template]
- Added automated provisioning: [scripts/create-business.sh]
- Added per-business database/user, secrets, media volume, private networks, and Caddy route generation.
- Removed Traefik and manual business Compose files.
- Updated environment templates, .gitignore, and deployment documentation in [README.md]
Validation completed:
- Docker Compose config passed for infra, Caddy, and generated business stacks.
- Shell syntax validation passed.
- Registry image tags containing / were tested.
- No remaining Traefik or obsolete deployment references found.

.gitignore

@@ -34,6 +34,9 @@ dist/
 .env.infra
 .env.business.*
 !.env.business.example
+.env.caddy
+stacks/*/.env
+stacks/caddy/sites/*.caddy
 
 # prisma
 prisma/dev.db
@@ -64,4 +67,4 @@ yarn-error.log*
 
 .agents/
 .claude/
-.windsurf/
+.windsurf/