feat: improve Jira PR sync workflow reliability

prevent infinite loops by skipping unchanged PR updates, and add trigger event logging for debugging

Signed-off-by: Nir Argaman <nargaman@redhat.com>

Author: nirarg

.github/workflows/jira-pr-sync.yml

@@ -40,6 +40,11 @@ jobs:
           NO_TICKET_LABEL: ${{ inputs.no-ticket-label }}
         with:
           script: |
+            // Log what triggered this workflow run
+            const eventName = context.eventName;
+            const action = context.payload.action;
+            core.info(`🔍 Workflow triggered - Event: ${eventName}, Action: ${action}`);
+
             const prBody = context.payload.pull_request.body || '';
             const prTitle = context.payload.pull_request.title || '';
             const prNumber = context.payload.pull_request.number;
@@ -205,6 +210,18 @@ jobs:
               updatedBody = prBody ? `${prBody}\n\n${newJiraSection}` : newJiraSection;
             }
 
+            // Only update PR if content actually changed
+            // Normalize whitespace for comparison to avoid false positives
+            const normalizedUpdated = updatedBody.trim().replace(/\s+/g, ' ');
+            const normalizedCurrent = prBody.trim().replace(/\s+/g, ' ');
+
+            if (normalizedUpdated === normalizedCurrent) {
+              core.info('✓ Jira links section is already up to date, no PR update needed');
+              return;
+            }
+
+            core.info('📝 Jira links section has changes, updating PR description');
+
             // Update PR description
             await github.rest.pulls.update({
               owner: context.repo.owner,