ADD conflicts file for pull api

app/models/gitea/pull.rb

@@ -0,0 +1,11 @@
+class Gitea::Pull < Gitea::Base
+  self.inheritance_column = nil # FIX  The single-table inheritance mechanism failed
+  # establish_connection :gitea_db
+  
+  self.table_name = "pull_request"
+
+  serialize :conflicted_files, Array
+
+  belongs_to :pull_request, class_name: '::PullRequest', foreign_key: :id, primary_key: :gpid, optional: true
+
+end

app/models/pull_request.rb

@@ -37,6 +37,7 @@ class PullRequest < ApplicationRecord
   has_many :pull_request_tags, foreign_key: :pull_request_id
   has_many :project_trends, as: :trend, dependent: :destroy
   has_many :attachments, as: :container, dependent: :destroy
+  has_one :gitea_pull, foreign_key: :id, primary_key: :gpid, class_name: 'Gitea::Pull'
 
   scope :merged_and_closed, ->{where.not(status: 0)}
   scope :opening, -> {where(status: 0)}
@@ -82,4 +83,11 @@ class PullRequest < ApplicationRecord
       pr.update_column(:commits_count, commits_result.size) unless commits_result.blank?
     end
   end
+
+  def conflict_files
+    file_names = self&.gitea_pull&.conflicted_files
+    return [] if file_names.blank?
+
+    JSON.parse file_names
+  end
 end