fix(compose): rename postgres volume to force fresh init with current password

The existing postgres_data volume was initialized with a stale/mismatched password.
Renaming to postgres_data_v2 forces postgres to reinitialize with the current
POSTGRES_PASSWORD env var, resolving the 28P01 auth failure.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

compose.coolify.yml

@@ -31,9 +31,7 @@ services:
       - 'coolify.name=agenthub'
       - 'coolify.type=application'
       - 'traefik.enable=true'
-      # Tell Traefik which Docker network to use for routing
       - 'traefik.docker.network=coolify'
-      # HTTPS router for agenthub.barodine.net
       - 'traefik.http.routers.agenthub.rule=Host(`agenthub.barodine.net`)'
       - 'traefik.http.routers.agenthub.entrypoints=websecure'
       - 'traefik.http.routers.agenthub.tls=true'
@@ -57,7 +55,7 @@ services:
       POSTGRES_INITDB_ARGS: '--encoding=UTF8 --locale=C'
       PGDATA: /var/lib/postgresql/data/pgdata
     volumes:
-      - postgres_data:/var/lib/postgresql/data
+      - postgres_data_v2:/var/lib/postgresql/data
     restart: unless-stopped
     healthcheck:
       test: ['CMD-SHELL', 'pg_isready -U ${POSTGRES_USER:-agenthub} -d ${POSTGRES_DB:-agenthub}']
@@ -124,7 +122,7 @@ services:
       - 'ofelia.job-exec.backup-daily.command=/usr/local/bin/backup.sh'
 
 volumes:
-  postgres_data:
+  postgres_data_v2:
     driver: local
     labels:
       - 'coolify.managed=true'