Account schema: specify that pleroma.relationship is nullable

lib/pleroma/web/api_spec/helpers.ex

@@ -63,7 +63,7 @@ def with_relationships_param do
       :with_relationships,
       :query,
       BooleanLike,
-      "Embed relationships into accounts."
+      "Embed relationships into accounts. **If this parameter is not set account's `pleroma.relationship` is going to be `null`.**"
     )
   end
 

lib/pleroma/web/api_spec/schemas/account.ex

@@ -96,7 +96,7 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Account do
               hide_notification_contents: %Schema{type: :boolean}
             }
           },
-          relationship: AccountRelationship,
+          relationship: %Schema{allOf: [AccountRelationship], nullable: true},
           settings_store: %Schema{
             type: :object,
             description:

lib/pleroma/web/api_spec/schemas/account_relationship.ex

@@ -10,7 +10,7 @@ defmodule Pleroma.Web.ApiSpec.Schemas.AccountRelationship do
 
   OpenApiSpex.schema(%{
     title: "AccountRelationship",
-    description: "Response schema for relationship",
+    description: "Relationship between current account and requested account",
     type: :object,
     properties: %{
       blocked_by: %Schema{type: :boolean},