chore: Ensure null validation for private attribute in messages (#8085)

db/migrate/20231011041615_ensure_message_private_not_null.rb

@@ -0,0 +1,5 @@
+class EnsureMessagePrivateNotNull < ActiveRecord::Migration[7.0]
+  def change
+    change_column_null :messages, :private, false, false
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_08_01_180936) do
+ActiveRecord::Schema[7.0].define(version: 2023_10_11_041615) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"
@@ -661,7 +661,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_01_180936) do
     t.integer "message_type", null: false
     t.datetime "created_at", precision: nil, null: false
     t.datetime "updated_at", precision: nil, null: false
-    t.boolean "private", default: false
+    t.boolean "private", default: false, null: false
     t.integer "status", default: 0
     t.string "source_id"
     t.integer "content_type", default: 0, null: false