Missing FK indexes on cpanel_provisioned_service and enhance_db_access_rules
Imported from GitHub issue El-SaMa/oma#96 by @El-SaMa.
`cpanel_provisioned_service` has no index on `(organization_id, service_id, credential_id)` despite `enhance_provisioned_service` having them for the same access pattern — joins will seq-scan.
`enhance_db_access_rules` (new, migration 0052) is missing the same: no index on `(service_id, organization_id)`.
Fix: ```sql create index cpanel_provisioned_service_org_idx on cpanel_provisioned_service(organization_id); create index cpanel_provisioned_service_service_idx on cpanel_provisioned_service(service_id); create index enhance_db_access_rules_service_idx on enhance_db_access_rules(service_id); ```