rename sync-completion methods to avoid confusion with stage setters (#22138)

`markAsCompletedAndMarkAsCalendarEventListFetchPending` was just
`markAsCalendarEventListFetchPending`
with a prefix, so dropping the prefix silently turned a sync-completion
into a plain stage reset

Renamed to markAsCalendarEventSyncCompleted / markAsMessageSyncCompleted
so they
no longer share a tail with the stage setters. Mirrors the existing
markAsFailed naming. No behavior change.

Sanity check: replayed the original #22015 diff through two isolated
review agents, identical prompt,
only the names differing. With the old names the reviewer explicitly
cleared the branch as safe; with
the new names it flagged the missing completion as high severity. The
rename makes the mistake visible.

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packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service.ts

@@ -72,7 +72,7 @@ export class CalendarEventsImportService {
           );
 
           if (!eventIdsToFetch || eventIdsToFetch.length === 0) {
-            await this.calendarChannelSyncStatusService.markAsCompletedAndMarkAsCalendarEventListFetchPending(
+            await this.calendarChannelSyncStatusService.markAsCalendarEventSyncCompleted(
               [calendarChannel.id],
               workspaceId,
             );
@@ -170,7 +170,7 @@ export class CalendarEventsImportService {
           );
 
           if (eventIdsToFetch.length < CALENDAR_EVENT_IMPORT_BATCH_SIZE) {
-            await this.calendarChannelSyncStatusService.markAsCompletedAndMarkAsCalendarEventListFetchPending(
+            await this.calendarChannelSyncStatusService.markAsCalendarEventSyncCompleted(
               [calendarChannel.id],
               workspaceId,
             );

packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service.ts

@@ -87,7 +87,7 @@ export class CalendarFetchEventsService {
               workspaceId,
             );
           } else {
-            await this.calendarChannelSyncStatusService.markAsCompletedAndMarkAsCalendarEventListFetchPending(
+            await this.calendarChannelSyncStatusService.markAsCalendarEventSyncCompleted(
               [calendarChannel.id],
               workspaceId,
             );

packages/twenty-server/src/modules/calendar/common/services/calendar-channel-sync-status.service.ts

@@ -206,7 +206,7 @@ export class CalendarChannelSyncStatusService {
     );
   }
 
-  public async markAsCompletedAndMarkAsCalendarEventListFetchPending(
+  public async markAsCalendarEventSyncCompleted(
     calendarChannelIds: string[],
     workspaceId: string,
   ) {