Describe the bug

Running mqtt5_pubsub.py with --count raises:
TypeError: '<=' not supported between instances of 'int' and 'str' because the argument is parsed as a string instead of an integer.

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

The script should parse --count as an integer and run without errors.

Current Behavior

When running mqtt5_pubsub.py with --count, the argument is parsed as a string instead of an integer.
This causes a TypeError when the code compares publish_count (int) with message_count (str).

Reproduction Steps

Run the script with a --count value:
python3 mqtt5_pubsub.py --count 5
and look out for the error raised.

Possible Solution

Update the argparse definition of --count to specify type=int, so that it is always parsed as an integer.

Additional Information/Context

This issue only occurs when using the --count argument because it was being parsed as a string.
A screenshot of the error is attached above for reference.

SDK version used

AWS IoT Device SDK for Python v2

Environment details (OS name and version, etc.)

OS: Ubuntu 22.04.5 LTS (Linux 6.8.0-60-generic) Python: 3.10.12 Architecture: x86_64