A service that declares SERVICE_FQDN_X_PORT while the named service declares
SERVICE_URL_X_PORT (same value) now counts as a copy, like an exact copy, so it
does not take the named service's domain. Also replace the Postgres-only
regex in the magic variable loop with the same check in PHP.
When a compose service copies another service's SERVICE_URL_/SERVICE_FQDN_
declaration (old Twenty template: worker repeats SERVICE_URL_TWENTY_3000),
the parser and updateCompose wrote the variable from the copier's generated
domain, so a custom domain on the named service was lost on every deploy.
Skip exact copies; declarations with another path or port are unchanged.
Closes#11924
Normalize schemes when comparing routing identities and include per-service
Compose domains in conflict checks. Show the conflicting service name and
align the service domains heading layout.
PHP's FILTER_VALIDATE_URL rejects underscores in the host, so domains
like https://myapp_service.example.com were rejected by the API and
never got a Let's Encrypt certificate. Add an isValidDomainUrl() helper
that validates a copy with underscores replaced by hyphens, and route
domain validation in the Applications and Services API controllers
through it.
Fixes#10597