Poll dispatch_due in the worker so scheduled posts fire.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/worker-entrypoint.sh

@@ -47,5 +47,24 @@ uv run python manage.py migrate --noinput
 # worker must too or hashed lookups raise ValueError.
 uv run python manage.py collectstatic --noinput
 
+interval="${DISPATCH_DUE_INTERVAL_SECONDS:-15}"
+echo "Starting dispatch_due poller (every ${interval}s)."
+uv run python manage.py dispatch_due --loop --interval "${interval}" &
+dispatch_pid=$!
+
+cleanup() {
+  echo "Stopping dispatch_due poller..."
+  kill "${dispatch_pid}" 2>/dev/null || true
+  wait "${dispatch_pid}" 2>/dev/null || true
+}
+trap cleanup EXIT INT TERM
+
+# Dev uses ImmediateBackend: enqueue runs inline in dispatch_due. No dj-queue.
+if [[ "${DJANGO_ENV:-}" == "dev" ]]; then
+  echo "Dev worker: dispatch_due loop publishes scheduled work."
+  wait "${dispatch_pid}"
+  exit $?
+fi
+
 # dj-queue supervisor (workers + dispatcher + scheduler). Run on ONE host only.
-exec uv run python manage.py dj_queue
+uv run python manage.py dj_queue