feat: 配置写死与 baked 模块，Alembic 建表，百度仅 BAIDU_*

- 新增 app/baked/algorithm|pipeline，非部署参数不再走 env；Settings 保留 DB/HTTP/RTSP/海康/百度/MinIO/Demo
- 移除 init_db_schema 与 reload 配置；main 仅 check_database；start*.sh 在 uvicorn 前执行 alembic upgrade head
- 依赖 psycopg[binary] 供 Alembic 同步 URL；alembic/env 注释与预发清单更新
- 撕段门控消费管线、各视频/语音/归档调用改为 baked
- 百度环境变量仅 BAIDU_APP_ID、BAIDU_API_KEY、BAIDU_SECRET_KEY 与 BAIDU_* 超时/ASR；人脸脚本与 baidu_speech 文案同步
- 全量单测与 .env.example 更新；.gitignore 忽略 refs/（本地权重/视频不入库）

Made-with: Cursor

tests/test_baidu_unified_env.py

@@ -0,0 +1,20 @@
+"""百度凭据：仅从环境变量 BAIDU_APP_ID / BAIDU_API_KEY / BAIDU_SECRET_KEY 读入。"""
+
+import os
+from unittest.mock import patch
+
+from app.config import Settings
+
+
+def test_speech_creds_from_baidu_env_triplet() -> None:
+    extra = {
+        "BAIDU_APP_ID": "app-x",
+        "BAIDU_API_KEY": "key-x",
+        "BAIDU_SECRET_KEY": "sec-x",
+    }
+    with patch.dict(os.environ, extra, clear=False):
+        s = Settings()
+    assert s.baidu_speech_app_id == "app-x"
+    assert s.baidu_speech_api_key == "key-x"
+    assert s.baidu_speech_secret_key == "sec-x"
+    assert s.baidu_speech_configured is True