chore(scripts): add development, DSH and sidecar launchers

scripts/start_dsh.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+# 启动独立 DSH 内容生产 Worker。API 与 DSH 必须使用同一个 YAWAN_DATA_DIR，
+# 以共享 SQLite 队列、知识库、向量索引和 artifacts 产物目录。
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$ROOT/server"
+
+if [ -f "$ROOT/.env.production" ]; then
+  set -a
+  . "$ROOT/.env.production"
+  set +a
+fi
+
+export YAWAN_ENV="${YAWAN_ENV:-prod}"
+export YAWAN_EXECUTION_BACKEND="${YAWAN_EXECUTION_BACKEND:-dsh}"
+export YAWAN_DSH_LOG_LEVEL="${YAWAN_DSH_LOG_LEVEL:-INFO}"
+
+if [ -x "$ROOT/server/.venv/bin/python" ]; then
+  PY="$ROOT/server/.venv/bin/python"
+elif [ -x "$ROOT/.venv/bin/python" ]; then
+  PY="$ROOT/.venv/bin/python"
+else
+  PY="${PYTHON:-python3}"
+fi
+
+LOG_FILE="${YAWAN_DSH_LOG_FILE:-/tmp/yawan-dsh.log}"
+nohup "$PY" -m app.dsh_worker >> "$LOG_FILE" 2>&1 &
+pid=$!
+echo "DSH worker started: pid=$pid log=$LOG_FILE backend=$YAWAN_EXECUTION_BACKEND env=$YAWAN_ENV"