* Update datails known numbering in the db
* Update check answers card headers
* Display same person pges for joint and non-joint purchase
* Only display person questions once
* Remove unused person class and methods
* Always display person known pages and update headers
* Fix depends on, show retirement validation for buyer 2
* test
* Add person 5 to test
* fix context description
* Display person known question for appropriate number of other household members
* tests
* update test
* Remove page id stubbing
* Remove redundant tests
* only put validation on the pages that are routed to
* Refactor tests
* Refactor details known to reuse pages and questions
* Refactor page_depends_on
* Use field_for_person
* feat: tweak person_known behaviour to only show for people 2-4, and ask person_known regardless of answer to previous person_known questions. Also remove redundant personx_known files
* test: update tests
* feat: add dynamic cya card titles
* refactor: simplificaiton
* refactor: use check_answers_card_number again
* refactor: linting
* tests: add card title tests for sales log CYA page
* refactor: linting
* feat: make private method private
* feat: update person known behaviour
* test: update tests
* test: update tests
* test: add new person known tests
* feat: remove buyer 1 working situation duplicated header
* refactor: linting
Co-authored-by: Kat <katrina@kosiak.co.uk>
* Refactor details known to reuse pages and questions
* Refactor page_depends_on
* Use field_for_person
* feat: tweak person_known behaviour to only show for people 2-4, and ask person_known regardless of answer to previous person_known questions. Also remove redundant personx_known files
* test: update tests
* feat: add person 1 known page back in
Co-authored-by: natdeanlewissoftwire <nat.dean-lewis@softwire.com>