fix: handle PR creation failure with set +e to avoid script exit

Author: Patel230

scripts/evolution/evolve.sh

@@ -248,17 +248,20 @@ $JOURNAL_EXCERPT
 ---
 *Auto-generated by iterate*"
 
-PR_RESULT=$(gh pr create \
+set +e
+PR_OUTPUT=$(gh pr create \
   --repo "$GITHUB_REPO" \
   --title "$PR_TITLE" \
   --body "$PR_BODY" \
   --base main \
   --head "$BRANCH" 2>&1)
+PR_EXIT=$?
+set -e
 
-if [[ $? -eq 0 ]]; then
-  log "PR created: $PR_RESULT"
+if [[ $PR_EXIT -eq 0 ]]; then
+  log "PR created: $PR_OUTPUT"
 else
-  log "PR creation failed: $PR_RESULT"
+  log "PR creation failed: $PR_OUTPUT"
   # Fallback: push directly to main
   log "Falling back to direct push to main..."
   git checkout main 2>/dev/null || true