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.

goclaw/README.md

@@ -5,7 +5,7 @@ providers, messaging channels (Telegram, Discord, Slack, Zalo, Feishu,
 WhatsApp), agent teams, and a knowledge vault, behind one binary with a
 built-in web dashboard.
 
-Two containers: `goclaw`, and `postgres` — pgvector, which holds tenants,
+Two containers: `goclaw`, and `db` — pgvector, which holds tenants,
 sessions, encrypted provider keys and the semantic memory.
 
 ## Setup
@@ -75,14 +75,14 @@ and stored encrypted in PostgreSQL.
 | --- | --- | --- |
 | `goclaw-data` | `/app/data` | `config.json`, skills, Claude CLI credentials, runtime packages |
 | `goclaw-workspace` | `/app/workspace` | Files the agents work on |
-| `postgres-data` | `/var/lib/postgresql` | The database |
+| `db-data` | `/var/lib/postgresql` | The database |
 
 Upstream's PostgreSQL overlay adds a third `goclaw-skills` volume at
 `/app/skills`; it is not here, because `GOCLAW_SKILLS_DIR` points at
 `/app/data/skills` and the volume would mount empty over a path nothing reads.
 Skills persist in `goclaw-data` instead.
 
-`postgres-data` mounts `/var/lib/postgresql`, not `/var/lib/postgresql/data`.
+`db-data` mounts `/var/lib/postgresql`, not `/var/lib/postgresql/data`.
 PostgreSQL 18 images moved `PGDATA` down a level into a version directory, so
 the parent is now the mount point.
 

goclaw/compose.yml

@@ -5,7 +5,7 @@ services:
     environment:
       - GOCLAW_GATEWAY_TOKEN=${GOCLAW_GATEWAY_TOKEN:?required}
       - GOCLAW_ENCRYPTION_KEY=${GOCLAW_ENCRYPTION_KEY:?required}
-      - GOCLAW_POSTGRES_DSN=postgres://${POSTGRES_USER:-goclaw}:${POSTGRES_PASSWORD:-goclaw}@postgres:5432/${POSTGRES_DB:-goclaw}?sslmode=disable
+      - GOCLAW_POSTGRES_DSN=postgres://${POSTGRES_USER:-goclaw}:${POSTGRES_PASSWORD:-goclaw}@db:5432/${POSTGRES_DB:-goclaw}?sslmode=disable
       - GOCLAW_HOST=0.0.0.0
       - GOCLAW_PORT=18790
       - GOCLAW_CONFIG=/app/data/config.json
@@ -19,7 +19,7 @@ services:
       - goclaw-data:/app/data
       - goclaw-workspace:/app/workspace
     depends_on:
-      postgres:
+      db:
         condition: service_healthy
     healthcheck:
       test: ["CMD-SHELL", "wget -qO- http://localhost:18790/health || exit 1"]
@@ -48,7 +48,7 @@ services:
           pids: 200
 
   # PostgreSQL 18 with pgvector, for agent memory and the knowledge vault.
-  postgres:
+  db:
     image: pgvector/pgvector:pg18
     restart: unless-stopped
     environment:
@@ -56,7 +56,7 @@ services:
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-goclaw}
       POSTGRES_DB: ${POSTGRES_DB:-goclaw}
     volumes:
-      - postgres-data:/var/lib/postgresql
+      - db-data:/var/lib/postgresql
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-goclaw} -d ${POSTGRES_DB:-goclaw}"]
       interval: 5s
@@ -66,4 +66,4 @@ services:
 volumes:
   goclaw-data:
   goclaw-workspace:
-  postgres-data:
+  db-data: