Showcase how to integrate DB-specific functions (#201)

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>

fiori/package.json

@@ -8,7 +8,7 @@
     "@capire/common": "*",
     "@sap/cds": "^4",
     "express": "^4.17.1",
-    "passport": "0.4.1"
+    "passport": "^0.4.1"
   },
   "scripts": {
     "start": "cds run --in-memory?",
@@ -23,8 +23,14 @@
         "kind": "odata", "model": "@capire/orders"
       },
       "db": {
-        "kind": "sql"
+        "kind": "sql",
+        "[development]": {
+          "model": "db/sqlite"
+        },
+        "[production]": {
+          "model": "db/hana"
+        }
       }
     }
   }
-}
+}