Feat: add code_executor_manager (#7814)

### What problem does this PR solve?

Add code_executor_manager. #4977.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

sandbox/executor_manager/core/config.py

@@ -0,0 +1,44 @@
+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+import os
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+from util import format_timeout_duration, parse_timeout_duration
+
+from core.container import init_containers, teardown_containers
+from core.logger import logger
+
+TIMEOUT = 10
+
+
+@asynccontextmanager
+async def _lifespan(app: FastAPI):
+    """Asynchronous lifecycle management"""
+    size = int(os.getenv("SANDBOX_EXECUTOR_MANAGER_POOL_SIZE", 1))
+
+    success_count, total_task_count = await init_containers(size)
+    logger.info(f"\n📊 Container pool initialization complete: {success_count}/{total_task_count} available")
+
+    yield
+
+    await teardown_containers()
+
+
+def init():
+    TIMEOUT = parse_timeout_duration(os.getenv("SANDBOX_TIMEOUT"))
+    logger.info(f"Global timeout: {format_timeout_duration(TIMEOUT)}")
+    return _lifespan