Add inverse_of pipeline -> statuses -> pipeline (#43134)

app/models/ci/pipeline.rb

@@ -13,7 +13,7 @@ module Ci
     belongs_to :pipeline_schedule, class_name: 'Ci::PipelineSchedule'
 
     has_many :stages
-    has_many :statuses, class_name: 'CommitStatus', foreign_key: :commit_id
+    has_many :statuses, class_name: 'CommitStatus', foreign_key: :commit_id, inverse_of: :pipeline
     has_many :builds, foreign_key: :commit_id
     has_many :trigger_requests, dependent: :destroy, foreign_key: :commit_id # rubocop:disable Cop/ActiveRecordDependent
     has_many :variables, class_name: 'Ci::PipelineVariable'

changelogs/unreleased/43134-reduce-queries-pipelines-controller-show.yml

+---
+title: Improve performance of pipeline page by reducing DB queries
+merge_request: 17168
+author:
+type: performance