Fix critical GitHub API pagination bugs in auto-merge workflow

This fixes a severe bug where the auto-merge workflow only checked the
first 30 commit statuses, causing it to miss failures and incorrectly
merge PRs with failing checks.

Root cause analysis:
- PR #5578 had 2 failed GB200 tests at 23:23-23:25 UTC
- By 03:29 UTC, 27+ new successful statuses pushed failures past position 30
- Workflow only fetched first page (30 items), saw 0 failures, and merged

Fixed 4 critical pagination issues:
1. listCommitStatusesForRef (line 140) - CRITICAL: Only saw 30 of 57 statuses
2. checks.listForRef (line 173) - Could miss failed checks if >30 exist
3. issues.listComments (line 349) - Wouldn't find status comment if >30 comments
4. pulls.list (line 64) - Could miss PR if >30 open PRs on branch

All API calls now use github.paginate() to retrieve complete results.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: xwang233

.github/workflows/auto-merge.yml

@@ -61,19 +61,19 @@ jobs:
               pr = data;
             } else {
               // For check_run events, we need to find the PR
-              const prs = await github.rest.pulls.list({
+              const prsData = await github.paginate(github.rest.pulls.list, {
                 owner: context.repo.owner,
                 repo: context.repo.repo,
                 state: 'open',
                 head: `${context.repo.owner}:${context.payload.check_run?.head_branch}`,
               });
 
-              if (prs.data.length === 0) {
+              if (prsData.length === 0) {
                 core.info('No open PR found for this commit');
                 return { should_skip: true };
               }
 
-              pr = prs.data[0];
+              pr = prsData[0];
             }
 
             // Defensive checks: skip if PR is from a fork
@@ -137,7 +137,7 @@ jobs:
             };
 
             // 1. Get all commit statuses (for nvfuser-ci and other status checks)
-            const { data: statuses } = await github.rest.repos.listCommitStatusesForRef({
+            const statuses = await github.paginate(github.rest.repos.listCommitStatusesForRef, {
               owner: context.repo.owner,
               repo: context.repo.repo,
               ref: sha,
@@ -170,11 +170,12 @@ jobs:
             );
 
             // 2. Get all check runs
-            const { data: checkRuns } = await github.rest.checks.listForRef({
+            const checkRunsData = await github.paginate(github.rest.checks.listForRef, {
               owner: context.repo.owner,
               repo: context.repo.repo,
               ref: sha,
             });
+            const checkRuns = { check_runs: checkRunsData };
 
             core.info(`Found ${checkRuns.check_runs.length} check runs`);
 
@@ -345,7 +346,7 @@ jobs:
             const statusText = statusLines.join('\n');
 
             // Find the comment with placeholders
-            const { data: comments } = await github.rest.issues.listComments({
+            const comments = await github.paginate(github.rest.issues.listComments, {
               owner: context.repo.owner,
               repo: context.repo.repo,
               issue_number: pr_number,