bef55bd11f
Open a separate pgx pool for the monitoring database, wire it into the SiteDomainMappingService, and surface its health in /readyz. Point compose at the dedicated monitoring-postgres service and align local/dev configs with the per-instance ports. Also reformat the site_domain_mapping types with gofmt while the files are touched. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>