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>

.env.example

@@ -6,7 +6,7 @@ TIMEZONE=UTC
 SECRET_KEY=your-secret-key-here-change-this-in-production
 
 # Database Settings (PostgreSQL)
-POSTGRES_DB=casera
+POSTGRES_DB=honeydue
 POSTGRES_USER=postgres
 POSTGRES_PASSWORD=change-this-secure-password
 DB_HOST=localhost
@@ -26,14 +26,14 @@ EMAIL_PORT=587
 EMAIL_USE_TLS=true
 EMAIL_HOST_USER=your-email@gmail.com
 EMAIL_HOST_PASSWORD=your-app-password
-DEFAULT_FROM_EMAIL=Casera <noreply@casera.com>
+DEFAULT_FROM_EMAIL=honeyDue <noreply@honeyDue.treytartt.com>
 
 # APNs Settings (iOS Push Notifications)
 # Direct APNs integration - no external push server needed
 APNS_AUTH_KEY_PATH=/path/to/AuthKey_XXXXXX.p8
 APNS_AUTH_KEY_ID=XXXXXXXXXX
 APNS_TEAM_ID=XXXXXXXXXX
-APNS_TOPIC=com.example.casera
+APNS_TOPIC=com.tt.honeyDue
 APNS_PRODUCTION=false  # Set to true for production APNs, false for sandbox
 
 # FCM Settings (Android Push Notifications)