add drain-mode orchestration and docs/tasks sync for codex-opencode

bin/mosaic-orchestrator-sync-tasks

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
+SYNC="$MOSAIC_HOME/rails/orchestrator-matrix/controller/tasks_md_sync.py"
+
+if [[ ! -f "$SYNC" ]]; then
+  echo "[mosaic-orchestrator-sync] missing sync script: $SYNC" >&2
+  exit 1
+fi
+
+exec python3 "$SYNC" --repo "$(pwd)" "$@"