* Initial implementation of active object counters. Need to clean up a bit more and examine reuse of stationary/active logic in neighboring modules.
* A bit more cleanup for references to active, referencing the tracked object method rather than duplicating logic.
* Minor formatting and readability cleanup
* Update docs with the new active mqtt metric definition.
* Move the check for a change in active status into the code block protected by a false positive check.
* - Add 'active' to the tracked object dictionary, use the previous object for active comparison.
- I also missed emitting updates when a tracked object is no longer tracked, and added handling for emitting zeros on object types.
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