feat: 语音确认、联调与运维增强

- 语音：序数解析（第一个/第二个等）、解析失败计数与 API detail.retry_remaining；
  百度 ASR 固定 dev_pid 为普通话；SurgeryPipelineError 支持 extra 并入 HTTP detail。
- Demo：demo 路由与假 RTSP、客户端 index 与 README；BackendResolver 与配置调整。
- 可观测：消耗 TSV 日志、语音文件日志、终端 Markdown 辅助；相关测试与依赖更新。
- 注意：.env 仍被 gitignore，本地密钥不会进入本提交。

Made-with: Cursor

start.sh

@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
-# Start PostgreSQL from docker-compose.dev.yml and run the FastAPI app on the host.
+# Start PostgreSQL + MinIO from docker-compose.dev.yml and run FastAPI on the host.
 # Usage: ./start.sh
 # Optional: SKIP_DOCKER=1 to skip Compose and use an existing PostgreSQL instance.
+# Same flow but TRUNCATE app tables before the server: ./start_fresh.sh
 
 set -euo pipefail
 
@@ -11,7 +12,9 @@ cd "$ROOT"
 COMPOSE_FILE="${COMPOSE_FILE:-docker-compose.dev.yml}"
 
 if [[ "${SKIP_DOCKER:-0}" != "1" ]]; then
-  docker compose -f "$COMPOSE_FILE" up -d db
+  echo "Starting Docker Compose services: db, minio ($COMPOSE_FILE)"
+  docker compose -f "$COMPOSE_FILE" up -d db minio
+  echo "MinIO API: http://127.0.0.1:${MINIO_PORT:-9000}  console: http://127.0.0.1:${MINIO_CONSOLE_PORT:-9001}"
   echo "Waiting for PostgreSQL..."
   for _ in $(seq 1 60); do
     if docker compose -f "$COMPOSE_FILE" exec -T db \