operator: add route to get app event log

we cannot go via /cloudron/eventlog since that requires admin

src/apps.js

@@ -79,6 +79,8 @@ exports = module.exports = {
     getIcon,
     getMemoryLimit,
 
+    listEventlog,
+
     downloadFile,
     uploadFile,
 
@@ -2287,6 +2289,16 @@ async function schedulePendingTasks() {
     }
 }
 
+async function listEventlog(app, page, perPage) {
+    assert.strictEqual(typeof app, 'object');
+    assert.strictEqual(typeof page, 'number');
+    assert.strictEqual(typeof perPage, 'number');
+
+    const actions = [];
+    const search = app.id;
+    return await eventlog.listPaged(actions, search, page, perPage);
+}
+
 function downloadFile(app, filePath, callback) {
     assert.strictEqual(typeof app, 'object');
     assert.strictEqual(typeof filePath, 'string');