Remove Gorush, use direct APNs/FCM, fix worker queries

- Remove Gorush push server dependency (now using direct APNs/FCM)
- Update docker-compose.yml to remove gorush service
- Update config.go to remove GORUSH_URL
- Fix worker queries:
  - Use auth_user instead of user_user table
  - Use completed_at instead of completion_date column
- Add NotificationService to worker handler for actionable notifications
- Add docs/PUSH_NOTIFICATIONS.md with architecture documentation
- Update README.md, DOKKU_SETUP.md, and dev.sh

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docker-compose.yml

@@ -38,37 +38,6 @@ services:
     networks:
       - casera-network
 
-  # Gorush Push Notification Server
-  # Note: Disabled by default. Start with: docker-compose --profile push up
-  gorush:
-    image: appleboy/gorush:latest
-    container_name: casera-gorush
-    restart: unless-stopped
-    profiles:
-      - push  # Only start when push profile is enabled
-    ports:
-      - "${GORUSH_PORT:-8088}:8088"
-    volumes:
-      - ./push_certs:/certs:ro
-    environment:
-      GORUSH_CORE_PORT: "8088"
-      GORUSH_CORE_SYNC: "true"
-      GORUSH_IOS_ENABLED: "${GORUSH_IOS_ENABLED:-true}"
-      GORUSH_IOS_KEY_PATH: "/certs/apns_key.p8"
-      GORUSH_IOS_KEY_ID: "${APNS_AUTH_KEY_ID}"
-      GORUSH_IOS_TEAM_ID: "${APNS_TEAM_ID}"
-      GORUSH_IOS_TOPIC: "${APNS_TOPIC:-com.example.casera}"
-      GORUSH_IOS_PRODUCTION: "${APNS_PRODUCTION:-false}"
-      GORUSH_ANDROID_ENABLED: "${GORUSH_ANDROID_ENABLED:-true}"
-      GORUSH_ANDROID_APIKEY: "${FCM_SERVER_KEY}"
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8088/api/stat/go"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
-    networks:
-      - casera-network
-
   # Casera API
   api:
     build:
@@ -107,8 +76,7 @@ services:
       DEFAULT_FROM_EMAIL: ${DEFAULT_FROM_EMAIL:-Casera <noreply@casera.com>}
       EMAIL_USE_TLS: "${EMAIL_USE_TLS:-true}"
 
-      # Push Notifications
-      GORUSH_URL: "http://gorush:8088"
+      # Push Notifications (Direct APNs/FCM - no Gorush)
       APNS_AUTH_KEY_PATH: "/certs/apns_key.p8"
       APNS_AUTH_KEY_ID: ${APNS_AUTH_KEY_ID}
       APNS_TEAM_ID: ${APNS_TEAM_ID}
@@ -123,8 +91,6 @@ services:
         condition: service_healthy
       redis:
         condition: service_healthy
-      # gorush:  # Optional - enable when push notifications are configured
-      #   condition: service_started
     healthcheck:
       test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8000/api/health/"]
       interval: 30s
@@ -179,8 +145,13 @@ services:
       # Security
       SECRET_KEY: ${SECRET_KEY:-dev-secret-key-change-in-production-min-32-chars}
 
-      # Push Notifications
-      GORUSH_URL: "http://gorush:8088"
+      # Push Notifications (Direct APNs/FCM - no Gorush)
+      APNS_AUTH_KEY_PATH: "/certs/apns_key.p8"
+      APNS_AUTH_KEY_ID: ${APNS_AUTH_KEY_ID}
+      APNS_TEAM_ID: ${APNS_TEAM_ID}
+      APNS_TOPIC: ${APNS_TOPIC:-com.example.casera}
+      APNS_USE_SANDBOX: "${APNS_USE_SANDBOX:-true}"
+      FCM_SERVER_KEY: ${FCM_SERVER_KEY}
 
       # Email
       EMAIL_HOST: ${EMAIL_HOST:-smtp.gmail.com}