feat: add fetchAppMetadataBySourceId API function (#373)

Add new API function to fetch app metadata using project ID and source ID (app UID). This enables querying app metadata by the combination of project ID and app source identifier, expanding the available lookup methods beyond just app UID.

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: brandenrodgers

api/appsDev.ts

@@ -71,3 +71,17 @@ export function fetchAppMetadataByUid(
     },
   });
 }
+
+// Note: This is intentionally Project ID and not name
+export function fetchAppMetadataBySourceId(
+  projectId: number,
+  appUid: string,
+  accountId: number
+): HubSpotPromise<PublicApp> {
+  return http.get<PublicApp>(accountId, {
+    url: `${APPS_DEV_API_PATH}/project-id/${projectId}/source-id/${appUid}`,
+    params: {
+      sourceId: appUid,
+    },
+  });
+}