v1.15.3: 🔒 chore(strategy): update encryption 🔒 (#264)

* add class comment

* init doc

* more

* change init fx

* change encrypt fx

* change decrypt fx

* test file

* tests

* making more flexible

* end

* refactor

* rewrite test

* #patch

* update encrypted files

* lint

* get lint percent

* lint

* update thresholds

* changes

* revert and simplify

* add percent echo to other workflows

* loadfile test trial

* install pytest-xdist

* eliminate race condition

* revert pytest-xdist