新增：合并请求详情接口

app/services/api/v1/projects/pulls/get_service.rb

@@ -0,0 +1,32 @@
+class Api::V1::Projects::Pulls::GetService < ApplicationService
+
+  attr_reader :project, :pull_request, :owner, :repo, :index, :token
+  attr_accessor :gitea_data 
+
+  def initialize(project, pull_request, token = nil)
+    @project = project 
+    @pull_request = pull_request 
+    @owner = project&.owner.login 
+    @repo = project&.identifier 
+    @index = pull_request.gitea_number
+    @token = token 
+  end
+
+  def call 
+    load_gitea_data 
+
+    gitea_data 
+  end
+
+  private 
+  def request_params 
+    {
+      access_token: token
+    }
+  end
+
+  def load_gitea_data
+    @gitea_data = $gitea_client.get_repos_pulls_by_owner_repo_index(owner, repo, index, {query: request_params})
+    # raise Error, '获取合并请求失败！' unless @gitea_data.is_a?(Hash)
+  end
+end