Parameterize the Terraform config for more than one server

[JSONbored]

Problem: The Terraform configuration provisions exactly one server today — every resource is singular, with no count/for_each pattern for provisioning more.

Area: ORB / Fleet ops

Proposal: Parameterize the configuration to provision N servers from one definition, preserving today's single-server behavior as the default.

Deliverables:

• A Terraform configuration that can provision one or many servers from the same source.

[linear-code]

JSO-3555