[editor-core] accept the legacy source_project_display_name on project_file (#36837)

GitOrigin-RevId: bebbba328ecdd04ac4df06f66e6b0b1f8a41276f

libraries/overleaf-editor-core/lib/schemas.js

@@ -105,6 +105,10 @@ const rawLinkedFileData = z.discriminatedUnion('provider', [
     source_project_id: zz.objectId().optional(),
     v1_source_doc_id: z.number().optional(),
     source_entity_path: z.string(),
+    // written by the linked-file agents until 2018 (removed in ebe828aa625)
+    // and never since; still present in the history of projects that linked a
+    // file before then, so it has to be tolerated when replaying changes.
+    source_project_display_name: z.string().optional(),
     importedAt: z.iso.datetime().optional(),
   }),
   z.strictObject({

libraries/overleaf-editor-core/test/unit/schemas.test.js

@@ -111,6 +111,17 @@ describe('schemas', function () {
       expect(result.success).to.equal(true)
     })
 
+    it('accepts a project_file provider with a legacy display name', function () {
+      const result = rawLinkedFileData.safeParse({
+        provider: 'project_file',
+        v1_source_doc_id: 1234,
+        source_entity_path: '/main.tex',
+        source_project_display_name: 'My linked project',
+        importedAt: '2017-05-04T00:00:00.000Z',
+      })
+      expect(result.success).to.equal(true)
+    })
+
     it('rejects a project_file provider with a malformed source_project_id', function () {
       const result = rawLinkedFileData.safeParse({
         provider: 'project_file',