* refactor(api-members): separate handler for the GET /challenges/:challengeId/members route
* refactor(api-members): challenges-related code removed from _getMembersForItem handler function
* feat(api-members): added support to the new includeTasks query parameter for the GET /challenges/:challengeId/members route
* fix(api-members): adjustments to the GET /challenges/:challengeId/members route
* fix(api-members): merge of _getMembersTasksFromChallenge and additional check for a test suite
* refactor(api-members): includeAllMembers query parameter got removed from the GET /challenges/:challengeId/members route
* GET-challenges_challengeId_members.test.js: use _id
* members.js: use _id instead of id
* use id instead of _id
* _id instead of id
Co-authored-by: Matteo Pagliazzi <matteopagliazzi@gmail.com>
