[Bug] ModuleNotFoundError: No module named 'resource'

**Describe the bug**
Encountered error while attempting to run agent-task-queue

**To Reproduce:**
*Steps to reproduce the behavior:*
1. Run command $uvx agent-task-queue@latest$
2. Encountered error
```powershell
Traceback (most recent call last):
File "", line 203, in _run_module_as_main
File "", line 88, in _run_code
File "C:\Users\sheld\AppData\Local\uv\cache\archive-v0\d0WBs-76xzVqcxx1\Scripts\agent-task-queue.exe\__main__.py", line 4, in
from task_queue import main
File "C:\Users\sheld\AppData\Local\uv\cache\archive-v0\d0WBs-76xzVqcxx1\Lib\site-packages\task_queue.py", line 12, in
import resource
ModuleNotFoundError: No module named 'resource'
```

**Environment (please complete the following information):**
- OS: Windows 11

**Additional Notes**
`import resource` is `Linux\MacOS` specific.

For cross-compatibility, we could use
```
import os
import psutil
```
then change
```python
def get_memory_mb() -> float:
"""Get current process memory usage in MB (RSS - resident set size)."""
usage = resource.getrusage(resource.RUSAGE_SELF)
# ru_maxrss is in bytes on Linux, kilobytes on macOS
if os.uname().sysname == "Darwin":
return usage.ru_maxrss / (1024 * 1024) # KB to MB
return usage.ru_maxrss / 1024 # bytes to MB on Linux
```
to
```python
def get_memory_mb() -> float:
"""Get current process memory usage in MB (RSS - resident set size)."""
return psutil.Process(os.getpid()).memory_info().rss / (1024 ** 2)

```

Start in task_queue.py at the import resource and the get_memory_mb function shown in the issue. Run uvx agent-task-queue@latest on Windows to reproduce the ModuleNotFoundError, then verify the command starts successfully and reports process memory without the import failure.

索引モデルが issue の本文から書いたものです。