Bug: Running `.exec` on `SqlServerContainer` instance hangs indefinitely

Describe the bug

I am trying to create a table within a SqlServer container during start up. I am running the necessary command via the exec method, but said method just hangs and never exits.

Additional info: When bashing into the container and running the command, it works just fine and the process does not hang. Furthermore, running a different SQL query via the exec method such as SELECT 1 works as well.

To Reproduce

with SqlServerContainer(image="mcr.microsoft.com/mssql/server:2022-CU12-ubuntu-22.04") as container:
   container.exec(
      "/opt/mssql-tools/bin/sqlcmd -U SA -P 1Secure*Password1 -d tempdb -Q 'CREATE TABLE test_table (id INT PRIMARY KEY)'"
   )

Runtime environment

OS: Windows 11
Python version: 3.12.10
Docker version: 28.4.0, build d8eb465
Testcontainers version: 4.13.2

从 SqlServerContainer 的 exec 入口点开始，复现 issue 中完全相同的 sqlcmd CREATE TABLE 命令，并将其与可正常工作的 SELECT 1 示例进行比较。当 CREATE TABLE 命令通过 exec 正常退出，就算完成，这与在容器内部运行时的情况相同。