Rebrand from Casera/MyCrib to honeyDue

Total rebrand across all Go API source files:
- Go module path: casera-api -> honeydue-api
- All imports updated (130+ files)
- Docker: containers, images, networks renamed
- Email templates: support email, noreply, icon URL
- Domains: casera.app/mycrib.treytartt.com -> honeyDue.treytartt.com
- Bundle IDs: com.tt.casera -> com.tt.honeyDue
- IAP product IDs updated
- Landing page, admin panel, config defaults
- Seeds, CI workflows, Makefile, docs
- Database table names preserved (no migration needed)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deploy/cluster.env.example

@@ -5,10 +5,10 @@ DEPLOY_MANAGER_SSH_PORT=22
 DEPLOY_SSH_KEY_PATH=~/.ssh/id_ed25519
 
 # Stack settings
-DEPLOY_STACK_NAME=casera
-DEPLOY_REMOTE_DIR=/opt/casera/deploy
+DEPLOY_STACK_NAME=honeydue
+DEPLOY_REMOTE_DIR=/opt/honeydue/deploy
 DEPLOY_WAIT_SECONDS=420
-DEPLOY_HEALTHCHECK_URL=https://api.casera.app/api/health/
+DEPLOY_HEALTHCHECK_URL=https://api.honeyDue.treytartt.com/api/health/
 
 # Replicas and published ports
 API_REPLICAS=3