docs: Add cts_user_defined_meta option

website/content/docs/nia/configuration.mdx

@@ -95,6 +95,8 @@ service {
 - `name` - (string: required) The Consul logical name of the service (required).
 - `namespace` <EnterpriseAlert inline /> - (string: "default") The namespace of the service. If not provided, the namespace will be inferred from the Consul-Terraform-Sync ACL token, or default to the `default` namespace.
 - `tag` - (string) Tag is used to filter nodes based on the tag for the service.
+- `cts_user_defined_meta` - (map[string]) User-defined metadata is a map of strings that will be appended to the [service input variable](/docs/nia/installation/requirements#module-specifications) for compatible Terraform modules. Not all modules may use this value. To determine if your task uses metadata or what the expected keys and format are, reference documentation for the module(s) configured for your tasks.
+  - If multiple tasks depend on the same service but require different metadata, you can declare different sets of metadata for the same service. Define multiple service blocks for the service with unique IDs (and identical names) for those blocks. The metadata can then be separated per task based on the service IDs.
 
 ## Task
 

website/content/docs/nia/installation/requirements.mdx

@@ -131,6 +131,8 @@ variable "services" {
       node_datacenter       = string
       node_tagged_addresses = map(string)
       node_meta             = map(string)
+
+      cts_user_defined_meta = map(string)
     })
   )
 }