chore(backend): upgrade deps and remove redis/rq

compose.yml

@@ -17,18 +17,6 @@ services:
       timeout: 3s
       retries: 20
 
-  redis:
-    image: redis:7-alpine
-    volumes:
-      - redis_data:/data
-    ports:
-      - "${REDIS_PORT:-6379}:6379"
-    healthcheck:
-      test: ["CMD", "redis-cli", "ping"]
-      interval: 5s
-      timeout: 3s
-      retries: 20
-
   backend:
     build:
       # Build from repo root so the backend image can include repo-level assets
@@ -40,14 +28,11 @@ services:
     environment:
       # Override localhost defaults for container networking
       DATABASE_URL: postgresql+psycopg://${POSTGRES_USER:-postgres}:${POSTGRES_PASSWORD:-postgres}@db:5432/${POSTGRES_DB:-mission_control}
-      REDIS_URL: redis://redis:6379/0
       CORS_ORIGINS: ${CORS_ORIGINS:-http://localhost:3000}
       DB_AUTO_MIGRATE: ${DB_AUTO_MIGRATE:-true}
     depends_on:
       db:
         condition: service_healthy
-      redis:
-        condition: service_healthy
     ports:
       - "${BACKEND_PORT:-8000}:8000"
 
@@ -71,4 +56,3 @@ services:
 
 volumes:
   postgres_data:
-  redis_data: