feat(server): comment service and resolver (#12761)

close CLOUD-227
close CLOUD-230

































#### PR Dependency Tree


* **PR #12761** 👈
  * **PR #12924**
    * **PR #12925**

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Introduced a comprehensive commenting system, enabling users to
create, update, resolve, and delete comments and replies on documents.
* Added support for uploading attachments to comments, with clear error
messaging if size limits are exceeded.
* Implemented role-based permissions for comment actions, including a
new "Commenter" role.
* Enabled paginated listing and change tracking of comments and replies
via GraphQL queries.
* Provided full localization and error handling for comment-related
actions.

* **Bug Fixes**
* Improved uniqueness handling when fetching user data for comments and
replies.

* **Documentation**
* Extended GraphQL schema and frontend localization to document and
support new comment features.

* **Tests**
* Added extensive backend test suites covering all comment and reply
functionalities, permissions, and attachment uploads.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/base/graphql/__tests__/__snapshots__/pagination.spec.ts.md

@@ -79,3 +79,88 @@ Generated by [AVA](https://avajs.dev).
       },
       totalCount: 105,
     }
+
+## should return encode pageInfo with custom cursor
+
+> Snapshot 1
+
+    {
+      edges: [
+        {
+          cursor: '',
+          node: {
+            id: 11,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 12,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 13,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 14,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 15,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 16,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 17,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 18,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 19,
+          },
+        },
+        {
+          cursor: '',
+          node: {
+            id: 20,
+          },
+        },
+      ],
+      pageInfo: {
+        endCursor: 'eyJpZCI6MjAsIm5hbWUiOiJ0ZXN0MiJ9',
+        hasNextPage: true,
+        hasPreviousPage: false,
+        startCursor: 'eyJpZCI6MTAsIm5hbWUiOiJ0ZXN0In0=',
+      },
+      totalCount: 105,
+    }
+
+## should decode with json
+
+> Snapshot 1
+
+    {
+      id: 10,
+      name: 'test',
+    }

packages/backend/server/src/base/graphql/__tests__/pagination.spec.ts

@@ -4,7 +4,13 @@ import Sinon from 'sinon';
 
 import { createTestingApp } from '../../../__tests__/utils';
 import { Public } from '../../../core/auth';
-import { paginate, Paginated, PaginationInput } from '../pagination';
+import {
+  decodeWithJson,
+  paginate,
+  Paginated,
+  paginateWithCustomCursor,
+  PaginationInput,
+} from '../pagination';
 
 const TOTAL_COUNT = 105;
 const ITEMS = Array.from({ length: TOTAL_COUNT }, (_, i) => ({ id: i + 1 }));
@@ -104,3 +110,24 @@ test('should return encode pageInfo', async t => {
 
   t.snapshot(result);
 });
+
+test('should return encode pageInfo with custom cursor', async t => {
+  const result = paginateWithCustomCursor(
+    ITEMS.slice(10, 20),
+    TOTAL_COUNT,
+    { id: 10, name: 'test' },
+    { id: 20, name: 'test2' }
+  );
+
+  t.snapshot(result);
+});
+
+test('should decode with json', async t => {
+  const result = decodeWithJson<{ id: number; name: string }>(
+    'eyJpZCI6MTAsIm5hbWUiOiJ0ZXN0In0='
+  );
+  t.snapshot(result);
+
+  const result2 = decodeWithJson<{ id: number; name: string }>('');
+  t.is(result2, null);
+});

packages/backend/server/src/base/graphql/pagination.ts

@@ -65,6 +65,15 @@ const encode = (input: unknown) => {
 const decode = (base64String?: string | null) =>
   base64String ? Buffer.from(base64String, 'base64').toString('utf-8') : null;
 
+function encodeWithJson(input: unknown) {
+  return encode(JSON.stringify(input ?? null));
+}
+
+export function decodeWithJson<T>(base64String?: string | null): T | null {
+  const str = decode(base64String);
+  return str ? (JSON.parse(str) as T) : null;
+}
+
 export function paginate<T>(
   list: T[],
   cursorField: keyof T,
@@ -88,6 +97,31 @@ export function paginate<T>(
   };
 }
 
+export function paginateWithCustomCursor<T>(
+  list: T[],
+  total: number,
+  startCursor: unknown,
+  endCursor: unknown,
+  hasPreviousPage = false
+): PaginatedType<T> {
+  const edges = list.map(item => ({
+    node: item,
+    // set cursor to empty string for ignore it
+    cursor: '',
+  }));
+
+  return {
+    totalCount: total,
+    edges,
+    pageInfo: {
+      hasNextPage: list.length > 0,
+      hasPreviousPage,
+      endCursor: encodeWithJson(endCursor),
+      startCursor: encodeWithJson(startCursor),
+    },
+  };
+}
+
 export interface PaginatedType<T> {
   totalCount: number;
   edges: {