This also fixes validation errors from annotation LSP, which missed some
of the bookstore elements
Signed-off-by: Christian Georgi <christian.georgi@sap.com>
type:#Fixed was not rendering the value list as a drop down.
There was not UI validation for values entered.
The added annotation does both these: UI validation and renders the a drop down list.
Augment `AdminService.Author` by 2 fields `age` and `lifetime` whose
values are computed by SQLite and HANA-specific functions.
Don't do this in bookshop directly, to keep it simple. Instead, use
the fiori module, which also allows to integrate the fields in the UI.
Co-authored-by: Daniel <daniel.hutzel@sap.com>
