refactor: name supporting services and volumes by role

Rename database services to db and cache services to cache, with their
volumes as db-data and cache-data, in litellm, owncloud and goclaw. Rename
the couchbase and open-webui volumes to <service>-data. Data on miti-sg was
copied into the new volumes beforehand; the old volumes are kept.

litellm/compose.yml

@@ -6,8 +6,8 @@ services:
       - LITELLM_MASTER_KEY=${LITELLM_MASTER_KEY:?required}
       - UI_USERNAME=${UI_USERNAME:-admin}
       - UI_PASSWORD=${UI_PASSWORD:?required}
-      - DATABASE_URL=postgresql://${POSTGRES_USER:-litellm}:${POSTGRES_PASSWORD:?required}@postgres:5432/${POSTGRES_DB:-litellm}
-      - REDIS_HOST=redis
+      - DATABASE_URL=postgresql://${POSTGRES_USER:-litellm}:${POSTGRES_PASSWORD:?required}@db:5432/${POSTGRES_DB:-litellm}
+      - REDIS_HOST=cache
       - REDIS_PORT=6379
       - OPENROUTER_API_KEY=${OPENROUTER_API_KEY:-}
       - GEMINI_API_KEY=${GEMINI_API_KEY:-}
@@ -35,9 +35,9 @@ services:
       - --max_requests_before_restart
       - "1000"
     depends_on:
-      postgres:
+      db:
         condition: service_healthy
-      redis:
+      cache:
         condition: service_healthy
     healthcheck:
       test: ["CMD", "python", "-c", "import urllib.request;urllib.request.urlopen('http://127.0.0.1:4000/health/liveliness',timeout=5)"]
@@ -51,7 +51,7 @@ services:
           memory: 4G
 
   # PostgreSQL for keys, teams, budgets and spend logs.
-  postgres:
+  db:
     image: postgres:16-alpine
     restart: unless-stopped
     environment:
@@ -59,7 +59,7 @@ services:
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:?required}
       - POSTGRES_DB=${POSTGRES_DB:-litellm}
     volumes:
-      - pg-data:/var/lib/postgresql/data
+      - db-data:/var/lib/postgresql/data
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -h localhost -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
       interval: 5s
@@ -67,12 +67,12 @@ services:
       retries: 3
 
   # Redis for the response cache and router state.
-  redis:
+  cache:
     image: redis:7-alpine
     restart: unless-stopped
     command: redis-server --appendonly yes
     volumes:
-      - redis-data:/data
+      - cache-data:/data
     healthcheck:
       test: ["CMD", "redis-cli", "ping"]
       interval: 5s
@@ -80,5 +80,5 @@ services:
       retries: 3
 
 volumes:
-  pg-data:
-  redis-data:
+  db-data:
+  cache-data: