perf: decouple scheduled review comment sync

.github/workflows/sweep.yml

@@ -869,8 +869,37 @@ jobs:
             --path results/sweep-status \
             --rebase-strategy theirs
 
+      - name: Dispatch scheduled review comment sync
+        if: ${{ success() && github.event_name == 'schedule' && needs.plan.outputs.hot_intake != 'true' }}
+        env:
+          GH_TOKEN: ${{ github.token }}
+          TARGET_REPO: ${{ needs.plan.outputs.target_repo }}
+        run: |
+          set -euo pipefail
+          item_numbers="$(pnpm run --silent workflow -- artifact-item-numbers --artifact-dir artifacts)"
+          if [ -z "$item_numbers" ]; then
+            echo "No review artifacts to sync comments for."
+            exit 0
+          fi
+          for attempt in 1 2 3; do
+            if gh workflow run sweep.yml \
+              --ref main \
+              -f target_repo="$TARGET_REPO" \
+              -f apply_existing=true \
+              -f apply_sync_comments_only=true \
+              -f apply_item_numbers="$item_numbers" \
+              -f apply_limit=0 \
+              -f apply_comment_sync_min_age_days=7 \
+              -f apply_progress_every=25; then
+              echo "Dispatched scheduled comment sync for item numbers: $item_numbers"
+              exit 0
+            fi
+            sleep "$((attempt * 10))"
+          done
+          echo "::warning::Unable to dispatch scheduled comment sync after three attempts; apply/comment-sync backstops can pick it up later."
+
       - name: Sync selected review comments
-        if: ${{ success() && (needs.plan.outputs.hot_intake != 'true' || github.event.inputs.item_number != '' || github.event.inputs.item_numbers != '') }}
+        if: ${{ success() && (github.event_name != 'schedule' || needs.plan.outputs.hot_intake == 'true') && (needs.plan.outputs.hot_intake != 'true' || github.event.inputs.item_number != '' || github.event.inputs.item_numbers != '') }}
         timeout-minutes: 15
         env:
           GH_TOKEN: ${{ steps.target-write-token.outputs.token }}

docs/scheduler.md

@@ -184,6 +184,12 @@ association, paired issue/PR state, snapshot drift, and repository profile
 rules. It closes only unchanged high-confidence proposals and otherwise updates
 or syncs the durable ClawSweeper review comment.
 
+Scheduled normal review publishes records first, then dispatches durable review
+comment sync into the separate apply/comment-sync lane. This keeps slow GitHub
+comment writes from holding the normal review concurrency group and delaying the
+next 100-shard backfill wave. Exact and manual targeted review runs still sync
+their selected comments inline before finishing.
+
 Long apply runs commit checkpoints and can dispatch continuation runs when they
 reach the configured close limit.