test_prototype_mtc does not work with activitysim 1.3.1

[chunhochow]

When running activitysim 1.3.1 (installed using the Hacky solution documented in #919), test_prototype_mtc does NOT run, throwing a yaml syntax error.

To Reproduce

1. Install activitysim 1.3.1 with mamba create -n asim activitysim=1.3.1 multimethod=1.9 -c conda-forge --override-channels (see #919 for why multimethod=1.9 is required)
2. Follow the steps on https://activitysim.github.io/activitysim/v1.3.1/users-guide/run_primary_example.html
3. activitysim run -c configs -o output -d data gives the following:

yaml.constructor.ConstructorError: could not determine a constructor for the tag 'tag:yaml.org,2002:python/object/apply:activitysim.core.config.log_file_path'
  in "configs\logging.yaml", line 43, column 17

Additional Context

The config line in question is

!!python/object/apply:activitysim.core.config.log_file_path ['activitysim.log']

The relevant tracer line being (I think):

Lib\site-packages\activitysim\core\workflow\logging.py", line 96, in config_logger
    config_dict = yaml.load(f, Loader=yaml.SafeLoader)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Working hypothesis

My guess for why this is happening is because at some point activitysim switched to using yaml.SafeLoader at some point, and the config tag !!python/object/apply doesn't work with yaml.SafeLoder.

The most reasonable ChatGPT suggestion states:

Add a Custom Constructor in the Code Update the YAML loader in the activitysim\core\workflow\logging.py file to handle the !!python/object/apply tag.

Here's how to define and register a custom constructor:

import yaml
from activitysim.core.config import log_file_path

# Define a constructor for the custom tag
def log_file_path_constructor(loader, node):
    args = loader.construct_sequence(node)  # Extract the arguments
    return log_file_path(*args)

# Register the constructor for the specific tag
yaml.add_constructor(
    'tag:yaml.org,2002:python/object/apply:activitysim.core.config.log_file_path',
    log_file_path_constructor
)

Place this code in the activitysim\core\workflow\logging.py file before the yaml.load call.

But I don't know enough to act on this.