add hr_timesheet_sheet_no_review, hr_timesheet_sheet_holidays, hr_timesheet_sheet_delete_cascade

hr_timesheet_sheet_holidays/readme/DESCRIPTION.rst

@@ -0,0 +1,24 @@
+``hr_timesheet_sheet`` works on every analytic line of a period at once, while
+``project_timesheet_holidays`` protects the analytic lines it generates for validated
+time off against any modification or deletion. Together they make any timesheet sheet
+that spans a day with validated time off unmanageable: opening, recomputing, creating or
+saving such a sheet raises a ``UserError`` and the employee cannot record their hours.
+
+This bridge module makes time off lines inert with respect to the bulk operations of the
+sheet while keeping them visible inside it, so that the week is shown complete with its
+time off hours included. Two different code paths are involved and both are handled: the
+bulk ``write`` that links or unlinks ``sheet_id``, and the ``Command.DELETE`` the web
+client emits for the lines that leave the set cached by the onchange, which ends up in a
+real ``unlink()``. In the second case the time off line is detached from the sheet
+(``sheet_id = False``) instead of being deleted; the time off request and the employee
+balance are never touched.
+
+The protection itself is not relaxed: the hours, date, project, task, employee and
+description of a time off line still cannot be changed from a timesheet sheet, the line
+still cannot be deleted by hand and new timesheets still cannot be created on a time off
+task. Only a write that touches nothing but the neutral link fields is let through.
+
+The module also closes a pre-existing hole in ``hr_timesheet_sheet``, whose
+``_check_can_update_timesheet()`` returned ``True`` for any recordset without
+``sheet_id`` and therefore silently disabled the core protection for every time off line
+not linked to a sheet.