Fetch PR data once to avoid duplicate API calls

Extract the PR API call into the review method and pass it to
review_non_fork_branch and review_redmine_links so the same endpoint
is not fetched twice per run.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hsbt

tool/auto_review_pr.rb

@@ -60,9 +60,10 @@ def initialize(client)
 
   def review(pr_number)
     existing_comments = fetch_existing_comments(pr_number)
-    review_non_fork_branch(pr_number, existing_comments)
+    pr = @client.get("/repos/#{REPO}/pulls/#{pr_number}")
+    review_non_fork_branch(pr_number, pr, existing_comments)
     review_upstream_repos(pr_number, existing_comments)
-    review_redmine_links(pr_number, existing_comments)
+    review_redmine_links(pr_number, pr, existing_comments)
   end
 
   private
@@ -82,13 +83,12 @@ def post_comment(pr_number, comment)
   end
 
   # Suggest re-filing from a fork if the PR branch is in ruby/ruby itself
-  def review_non_fork_branch(pr_number, existing_comments)
+  def review_non_fork_branch(pr_number, pr, existing_comments)
     if already_commented?(existing_comments, FORK_COMMENT_PREFIX)
       puts "Skipped: The PR ##{pr_number} already has a fork branch comment."
       return
     end
 
-    pr = @client.get("/repos/#{REPO}/pulls/#{pr_number}")
     head_repo = pr.dig(:head, :repo, :full_name)
     if head_repo != REPO
       puts "Skipped: The PR ##{pr_number} is already from a fork (#{head_repo})."
@@ -124,13 +124,12 @@ def review_upstream_repos(pr_number, existing_comments)
     post_comment(pr_number, format_upstream_comment(upstream_repos))
   end
 
-  def review_redmine_links(pr_number, existing_comments)
+  def review_redmine_links(pr_number, pr, existing_comments)
     if already_commented?(existing_comments, REDMINE_COMMENT_PREFIX)
       puts "Skipped: The PR ##{pr_number} already has a Redmine links comment."
       return
     end
 
-    pr = @client.get("/repos/#{REPO}/pulls/#{pr_number}")
     text = "#{pr[:title]}\n#{pr[:body]}"
 
     tickets = text.scan(REDMINE_TICKET_PATTERN).uniq