docs(crewing): rewrite design-page bodies to the reconciled model
Bring the Crewing design pages in line with Crewing-Implementation-Spec
(no longer just banners): leave is Manager-approved (MPO removed from
leave and the planner); interview waiver is an explicit Manager-approved
action with no auto path; only MPO/Manager raise requisitions (site staff
request relief cover, new RELIEF_REQUEST model + ReliefRequestStatus); the
Application pipeline is the 7-stage board (competency & references merged,
docs before salary, JOINING folded into onboard); SalaryStructure is
effective-dated (mid-assignment changes prorate); victualing is a separate
wage line; verify_site_records drops leave.
Updates state/sequence diagrams, the ER model + enums, the permission
matrix, the use-case diagram/catalogue, and the user-story backlog. Each
page's banner is reduced to a plain pointer to the spec.
- Leave is applied by the Site in-charge on behalf of crew (crew are not
portal users), not self-service.
- Attendance is visible to site staff + Manager only; the MPO has no
attendance access. Drop MPO from record_attendance and (consequently)
generate_wage_report; add a view_attendance permission.
- A leave clash (approved leaves overlapping below a rank's required
strength) auto-raises a LEAVE requisition; documented across module,
design decisions, data model, workflows (new sequence), use cases,
user stories, roles matrix and the architecture diagram.
