fix: use non-conflicting ports for dev database containers

Change dev PostgreSQL host port from 5432 to 5433 and dev Redis from
6379 to 6380 to avoid conflicts with production containers or other
services on the host. Internal Docker network ports remain unchanged.

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

docker-compose.dev.minimal.yml

@@ -4,7 +4,7 @@ services:
     image: postgres:16-alpine
     container_name: portfolio_postgres_dev
     ports:
-      - "5432:5432"
+      - "5433:5432"
     environment:
       POSTGRES_DB: portfolio_dev
       POSTGRES_USER: portfolio_user
@@ -27,7 +27,7 @@ services:
     image: redis:7-alpine
     container_name: portfolio_redis_dev
     ports:
-      - "6379:6379"
+      - "6380:6379"
     volumes:
       - redis_dev_data:/data
     networks: