* Grafana Cloud migration, adding dashboards, fleet, alloy and synthetics
* modulize stuff now that we have multiple substantial things in here
* provider updates and new secrets
* remove grafana and prometheus from ansible
- Add configuration.yml from running helsinki-a deployment
- Replace example secrets with real SOPS-encrypted config.enc.yml
- Add LDAP and SMTP password file env vars to docker-compose
(all secrets now via file mounts, zero inline passwords)
- Update README with secret mapping and deployment steps
Closes PESO-89
