added missing loadbalancersecuritygroupid attribute and fields

Author: bm-stackit

docs/resources/loadbalancer.md

@@ -242,8 +242,9 @@ import {
 ### Read-Only
 
 - `id` (String) Terraform's internal resource ID. It is structured as "`project_id`","region","`name`".
+- `load_balancer_security_group_id` (String) The ID of the egress security group assigned to the Load Balancer's internal machines. This ID is essential for allowing traffic from the Load Balancer to targets in different networks or STACKIT network areas (SNA). To enable this, create a security group rule for your target VMs and set the `remote_security_group_id` of that rule to this value. This is typically used when `disable_security_group_assignment` is set to `true`.
 - `private_address` (String) Transient private Load Balancer IP address. It can change any time.
-- `security_group_id` (String) The ID of the egress security group assigned to the Load Balancer's internal machines. This ID is essential for allowing traffic from the Load Balancer to targets in different networks or STACKIT network areas (SNA). To enable this, create a security group rule for your target VMs and set the `remote_security_group_id` of that rule to this value. This is typically used when `disable_security_group_assignment` is set to `true`.
+- `security_group_id` (String) The ID of the backend security group
 
 <a id="nestedatt--listeners"></a>
 ### Nested Schema for `listeners`

stackit/internal/services/loadbalancer/loadbalancer/resource.go

@@ -345,7 +345,8 @@ func (r *loadBalancerResource) Schema(_ context.Context, _ resource.SchemaReques
 		"targets.display_name":                  "Target display name",
 		"ip":                                    "Target IP",
 		"region":                                "The resource region. If not defined, the provider region is used.",
-		"security_group_id":                     "The ID of the egress security group assigned to the Load Balancer's internal machines. This ID is essential for allowing traffic from the Load Balancer to targets in different networks or STACKIT network areas (SNA). To enable this, create a security group rule for your target VMs and set the `remote_security_group_id` of that rule to this value. This is typically used when `disable_security_group_assignment` is set to `true`.",
+		"security_group_id":                     "The ID of the backend security group",
+		"load_balancer_security_group_id":       "The ID of the egress security group assigned to the Load Balancer's internal machines. This ID is essential for allowing traffic from the Load Balancer to targets in different networks or STACKIT network areas (SNA). To enable this, create a security group rule for your target VMs and set the `remote_security_group_id` of that rule to this value. This is typically used when `disable_security_group_assignment` is set to `true`.",
 	}
 
 	resp.Schema = schema.Schema{
@@ -693,6 +694,13 @@ The example below creates the supporting infrastructure using the STACKIT Terraf
 					stringplanmodifier.UseStateForUnknown(),
 				},
 			},
+			"load_balancer_security_group_id": schema.StringAttribute{
+				Description: descriptions["load_balancer_security_group_id"],
+				Computed:    true,
+				PlanModifiers: []planmodifier.String{
+					stringplanmodifier.UseStateForUnknown(),
+				},
+			},
 		},
 	}
 }