fix(ci-gate): add copilot-pull-request-reviewer[bot] and debug logging

The Reviews API returns the bot login with [bot] suffix, but the Set
only contained the bare login. Also:
- Add 'opened' to pull_request types so gate runs on PR creation
- Add debug logging (event name, review logins) for troubleshooting

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: lpcox

.github/workflows/ci-gate.yml

@@ -10,7 +10,7 @@ on:
   pull_request_review:
     types: [submitted]
   pull_request:
-    types: [synchronize]  # push to PR branch
+    types: [opened, synchronize]  # new PR or push to PR branch
 
 permissions:
   issues: write
@@ -25,12 +25,14 @@ jobs:
         uses: actions/github-script@v7
         with:
           script: |
-            const copilotReviewers = new Set(['copilot', 'copilot[bot]', 'Copilot', 'copilot-pull-request-reviewer']);
+            const copilotReviewers = new Set(['copilot', 'copilot[bot]', 'Copilot', 'copilot-pull-request-reviewer', 'copilot-pull-request-reviewer[bot]']);
             const isCopilotReviewer = login => copilotReviewers.has(login ?? '');
             const { owner, repo } = context.repo;
             const pr_number = context.payload.pull_request?.number
               || context.payload.review?.pull_request?.number;
 
+            core.info(`Event: ${context.eventName}, PR: ${pr_number || 'none'}`);
+
             if (!pr_number) {
               core.info('No PR number found, skipping');
               return;
@@ -45,25 +47,30 @@ jobs:
               return;
             }
 
-            // For synchronize events (push after review), add label if review exists
+            // For synchronize/opened events (push after review), add label if review exists
             if (context.eventName === 'pull_request') {
               const { data: reviews } = await github.rest.pulls.listReviews({
                 owner, repo, pull_number: pr_number
               });
+              const reviewLogins = reviews.map(r => r.user?.login);
+              core.info(`Found ${reviews.length} review(s): ${reviewLogins.join(', ')}`);
               const hasCopilotReview = reviews.some(r => isCopilotReviewer(r.user?.login));
               if (hasCopilotReview) {
                 core.info('Post-review push detected, adding ready-for-ci label');
                 await github.rest.issues.addLabels({
                   owner, repo, issue_number: pr_number,
                   labels: ['ready-for-ci']
                 });
+              } else {
+                core.info('No Copilot review found yet, waiting');
               }
               return;
             }
 
             // For review events, check if review has actionable comments
             if (context.eventName === 'pull_request_review') {
               const reviewer = context.payload.review?.user?.login;
+              core.info(`Review event from: ${reviewer}`);
               if (!isCopilotReviewer(reviewer)) {
                 core.info(`Review from ${reviewer}, not Copilot — skipping`);
                 return;