refactor: use resource identifiers

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

src/models/collection.ts

@@ -4,6 +4,7 @@
 
 import type { CollectionInterface, CollectionModelInterface, CollectionPropertiesInterface, CollectionPropertiesModelInterface } from "@/types/collection";
 import { clonePlain } from './clone-plain';
+import type { CollectionIdentifier, ServiceIdentifier } from "@/services";
 
 export class CollectionObject implements CollectionModelInterface {
 
@@ -49,16 +50,16 @@ export class CollectionObject implements CollectionModelInterface {
         return this._data.provider;
     }
 
-    get service(): string | number {
-        return this._data.service;
+    get service(): ServiceIdentifier {
+        return this._data.service as ServiceIdentifier;
     }
 
-    get collection(): string | number | null {
-        return this._data.collection;
+    get collection(): CollectionIdentifier | null {
+        return this._data.collection as CollectionIdentifier | null;
     }
 
-    get identifier(): string | number {
-        return this._data.identifier;
+    get identifier(): CollectionIdentifier {
+        return this._data.identifier as CollectionIdentifier;
     }
 
     get signature(): string | null | undefined {