Docker secrets (postgresql_password, postgresql_pgadmin_password) already handled
POSTGRES_PASSWORD_FILE/PGADMIN_DEFAULT_PASSWORD_FILE. This removes the two remaining
`env_file: - postgresql.env` lines (postgresql + pgadmin services) which were redundant
and left the stack in a half-migrated hybrid state. Non-secret vars (POSTGRES_USER,
PGADMIN_DEFAULT_EMAIL, DATABASUS_HOST, PGADMIN_HOST) continue to be supplied via
stack-deploy.sh's envsubst mechanism from postgresql.env at deploy time — no functional
change to those values.
Deployed and verified live on docker-2 prior to this commit:
- postgresql_postgresql: pg_isready OK, all 21 databases intact, psql auth via Docker secret confirmed
- postgresql_pgadmin: Host(`dba.bryanmail.net`) rule + PGADMIN_DEFAULT_EMAIL correct
- postgresql_databasus: running
- All dependent stacks (mealie, vaultwarden, auth, media, homeassistant, guacamole, security) remained healthy throughout, zero reconnect issues
admin