Python: Bug: Multiple KernelProcessEventVisibility related issues

[drdrew42]

Describe the bug
Events emitted with visibility=KernelProcessEventVisibility.Public cannot be 'caught'.

There are overlapping causes:

• KernelProcessEvent is configured to use enum values (but everywhere visibility is checked as an enum)
• Once the previous is fixed, then when enqueue_step_messages processes events emitted, any Public events are processed and re-emitted before matching any of the step's edges -- however, doing so modifies the event's namespace in-place and in so doing prevents the event from propagating.

There is also a typo in LocalProcess.initialize_process ('factorie=' instead of 'factories=')

To Reproduce
Steps to reproduce the behavior:

1. run python/samples/getting_started_with_processes/step03/step03b_food_ordering.py
2. note that fish sandwich ends with fried fish completion (e.g. no bun), similarly for fish and chips, and none of the orders get 'packed' -- i.e. all food processes terminate on a Public event.

Expected behavior
All food orders should end with a 'Food Packed!' statement.

Platform

• Language: Python
• Source: main (python ver-1.20.3)
• AI model: N/A
• IDE: nvim
• OS: N/A