feat: add PostgreSQL to LiteLLM for UI auth support

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

compose/hf-pdocker-01/litellm/docker-compose.yml

@@ -13,6 +13,9 @@ services:
     labels:
       - "com.centurylinklabs.watchtower.enable=false"
     mem_limit: 1G
+    depends_on:
+      litellm-db:
+        condition: service_healthy
     healthcheck:
       test: ["CMD-SHELL", "curl -f http://localhost:4000/health || exit 1"]
       interval: 30s
@@ -24,3 +27,29 @@ services:
       options:
         max-size: "50m"
         max-file: "3"
+
+  litellm-db:
+    image: postgres:15-alpine
+    container_name: litellm-db
+    restart: unless-stopped
+    user: "1024:100"
+    environment:
+      - POSTGRES_DB=litellm
+      - POSTGRES_USER=litellm
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+    volumes:
+      - /mnt/docker-data/databases/litellm-db:/var/lib/postgresql/data
+    labels:
+      - "com.centurylinklabs.watchtower.enable=false"
+    mem_limit: 256M
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U litellm -d litellm"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 30s
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "50m"
+        max-file: "3"