add dynamic password complexity checking to the UserStep.  this is done by adding an /api/util/password_check endpoint that we can use to test passwords against as the user puts them in.

tidy up the DatabaseStep and add in full form validation support along with the ability to use the setup api to validate the connection details of possible new database creation.

update revision api tests so that they are focused on testing the endpoint functionality and not a bunch of other stuff.

flush out the unit tests for `(process-revision-event ...)` function which handles new events related to revision tracking.

upgrade the revisions code to work off our new events system so that we can remove some unnecessary code from our api endpoint implementations.

also, included here is a small tweak to the revision model to add a new field/column for :is_creation which is true when we know the revision represents the time when the object was created.

a couple small tweaks to our activity unit tests to prevent race conditions which intermittently cause test failures.

update unit test to account for the fact that we changed the query param for specifying the model id.

add some additional api validation so that we ensure the caller passes in an `id` param if they specify a filter mode of :database of :table

ability to filter list of Cards returned from GET /api/card by `:table` or `:database` both of which require a second arguement for `id`

make sure that new card attributes extracted from query dictionary are always set automatically on pre-update and pre-insert and tidy up unit tests to make sure everything is passing.