fix: side-effects from adding toPid to post intFields (now removed)

public/openapi/components/schemas/PostObject.yaml

@@ -10,6 +10,7 @@ PostObject:
     toPid:
       type: number
       description: The post that this post is in reply to
+      nullable: true
     content:
       type: string
     uid:

public/openapi/read/topic/topic_id.yaml

@@ -59,9 +59,6 @@ get:
                         tid:
                           type: number
                           description: A topic identifier
-                        toPid:
-                          type: number
-                          description: The post that this post is in reply to
                         content:
                           type: string
                         timestamp:
@@ -87,13 +84,6 @@ get:
                           type: string
                         index:
                           type: number
-                        parent:
-                          type: object
-                          properties:
-                            username:
-                              type: string
-                            displayname:
-                              type: string
                         user:
                           type: object
                           properties:

public/openapi/write/posts/pid.yaml

@@ -32,9 +32,6 @@ get:
                   tid:
                     type: number
                     description: A topic identifier
-                  toPid:
-                    type: number
-                    description: The post that this post is in reply to
                   content:
                     type: string
                   timestamp:

public/openapi/write/posts/pid/summary.yaml

@@ -41,6 +41,7 @@ get:
                   toPid:
                     type: number
                     description: The post that this post is in reply to
+                    nullable: true
                   content:
                     type: string
                   uid: