Add Bitrix required mixins (#2713)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

plugins/bitrix/src/types.ts

@@ -1,5 +1,5 @@
 import { ChannelProvider } from '@hcengineering/contact'
-import { AttachedDoc, Class, Doc, Ref } from '@hcengineering/core'
+import { AttachedDoc, Class, Doc, Mixin, Ref } from '@hcengineering/core'
 import { ExpertKnowledge, InitialKnowledge, MeaningfullKnowledge } from '@hcengineering/tags'
 
 /**
@@ -164,6 +164,9 @@ export interface BitrixEntityMapping extends Doc {
   comments: boolean
   activity: boolean
   attachments: boolean
+
+  // If specified, will include this mixins in any case.
+  mixins?: Ref<Mixin<Doc>>[]
 }
 /**
  * @public

plugins/bitrix/src/utils.ts

@@ -114,6 +114,11 @@ export async function convert (
   ][] = []
   const mixins: Record<Ref<Mixin<Doc>>, Data<Doc>> = {}
 
+  // Fill required mixins.
+  for (const m of entity.mixins ?? []) {
+    mixins[m] = {}
+  }
+
   const syncRequests: BitrixSyncRequest[] = []
 
   const extractValue = (field?: string, alternatives?: string[]): any | undefined => {