fix: disable sync on seeded message and calendar channels (#20168)

## Summary

The dev seeder creates `ConnectedAccount` records with fake OAuth tokens
(`'exampleRefreshToken'` / `'exampleAccessToken'`) and points
`MessageChannel` / `CalendarChannel` records at them with
`isSyncEnabled: true`. When the sync cron jobs run in the demo
workspace, they:

1. Pick up these seeded channels (filter is `isSyncEnabled: true` +
pending sync stage)
2. Try to refresh the fake OAuth tokens
3. Mark the channels as `FAILED_INSUFFICIENT_PERMISSIONS`
4. Surface a "Sync lost with mailbox X — please reconnect" banner in the
UI

This banner appears every time the demo workspace is loaded, even though
nothing is actually broken.

## Fix

Set `isSyncEnabled: false` on all 12 seeded channels (6 message, 6
calendar). This is the canonical "don't sync this channel" mechanism —
the same state a real user lands in when they toggle sync off in account
settings.

## Why this approach

- **ConnectedAccount records stay**: the demo workspace still shows Tim,
Jony, Phil, Jane as having connected their email/calendar — realistic
- **Pre-seeded messages and calendar events stay visible**: those don't
depend on `isSyncEnabled`
- **Crons no longer pick them up**: they filter on `isSyncEnabled:
true`, so `false` short-circuits the entire sync attempt — no failure,
no banner
- **Semantically correct**: the seeded accounts have fake tokens that
were never going to sync successfully; `isSyncEnabled: true` was
effectively a lie
- **No production code touched**: no `isDemo` flags, no magic-string
detection, no workspace-ID filters in the cron path

## Alternatives considered and rejected

- **Add an `isDemo` flag**: schema change, leaks demo knowledge into
production tables
- **Skip channels with fake tokens (`example*` pattern)**: hacky
magic-string detection in the auth refresh path
- **Filter demo workspace IDs in the cron**: production paths shouldn't
reference demo IDs
- **Don't activate demo workspaces**: breaks the demo workspace UX
entirely

## Test plan

- [ ] Reset the database and reseed (`npx nx database:reset
twenty-server`)
- [ ] Load the demo workspace — confirm no "Sync lost with mailbox"
banner appears
- [ ] Confirm seeded connected accounts still show in Settings →
Accounts
- [ ] Confirm pre-seeded messages and calendar events still appear in
the UI
- [ ] Confirm a real connected account (added via OAuth) still syncs
normally — its channel will have `isSyncEnabled: true` and the cron will
pick it up

## Related

Companion to https://github.com/twentyhq/twenty/pull/20167, which
removes the `--dev-mode` cron filter that was masking this banner issue
in the dev image.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/twenty-server/src/engine/workspace-manager/dev-seeder/data/constants/calendar-channel-data-seeds.constant.ts

@@ -42,7 +42,7 @@ export const CALENDAR_CHANNEL_DATA_SEEDS: CalendarChannelDataSeed[] = [
     handle: 'tim@apple.dev',
     visibility: CalendarChannelVisibility.METADATA,
     isContactAutoCreationEnabled: true,
-    isSyncEnabled: true,
+    isSyncEnabled: false,
   },
   {
     id: CALENDAR_CHANNEL_DATA_SEED_IDS.JONY,
@@ -50,7 +50,7 @@ export const CALENDAR_CHANNEL_DATA_SEEDS: CalendarChannelDataSeed[] = [
     handle: 'jony@apple.dev',
     visibility: CalendarChannelVisibility.SHARE_EVERYTHING,
     isContactAutoCreationEnabled: true,
-    isSyncEnabled: true,
+    isSyncEnabled: false,
   },
   {
     id: CALENDAR_CHANNEL_DATA_SEED_IDS.PHIL,
@@ -58,7 +58,7 @@ export const CALENDAR_CHANNEL_DATA_SEEDS: CalendarChannelDataSeed[] = [
     handle: 'phil@apple.dev',
     visibility: CalendarChannelVisibility.METADATA,
     isContactAutoCreationEnabled: true,
-    isSyncEnabled: true,
+    isSyncEnabled: false,
   },
   {
     id: CALENDAR_CHANNEL_DATA_SEED_IDS.JANE,
@@ -66,7 +66,7 @@ export const CALENDAR_CHANNEL_DATA_SEEDS: CalendarChannelDataSeed[] = [
     handle: 'jane.austen@apple.dev',
     visibility: CalendarChannelVisibility.SHARE_EVERYTHING,
     isContactAutoCreationEnabled: true,
-    isSyncEnabled: true,
+    isSyncEnabled: false,
   },
   {
     id: CALENDAR_CHANNEL_DATA_SEED_IDS.COMPANY_MAIN,
@@ -74,7 +74,7 @@ export const CALENDAR_CHANNEL_DATA_SEEDS: CalendarChannelDataSeed[] = [
     handle: 'company-main@apple.dev',
     visibility: CalendarChannelVisibility.SHARE_EVERYTHING,
     isContactAutoCreationEnabled: true,
-    isSyncEnabled: true,
+    isSyncEnabled: false,
   },
   {
     id: CALENDAR_CHANNEL_DATA_SEED_IDS.TEAM_CALENDAR,
@@ -82,6 +82,6 @@ export const CALENDAR_CHANNEL_DATA_SEEDS: CalendarChannelDataSeed[] = [
     handle: 'team-calendar@apple.dev',
     visibility: CalendarChannelVisibility.SHARE_EVERYTHING,
     isContactAutoCreationEnabled: true,
-    isSyncEnabled: true,
+    isSyncEnabled: false,
   },
 ];

packages/twenty-server/src/engine/workspace-manager/dev-seeder/data/constants/message-channel-data-seeds.constant.ts

@@ -59,7 +59,7 @@ export const MESSAGE_CHANNEL_DATA_SEEDS: MessageChannelDataSeed[] = [
     type: MessageChannelType.EMAIL,
     connectedAccountId: CONNECTED_ACCOUNT_DATA_SEED_IDS.TIM,
     handle: 'tim@apple.dev',
-    isSyncEnabled: true,
+    isSyncEnabled: false,
     visibility: MessageChannelVisibility.SHARE_EVERYTHING,
     syncStage: MessageChannelSyncStage.MESSAGE_LIST_FETCH_PENDING,
   },
@@ -72,7 +72,7 @@ export const MESSAGE_CHANNEL_DATA_SEEDS: MessageChannelDataSeed[] = [
     type: MessageChannelType.EMAIL,
     connectedAccountId: CONNECTED_ACCOUNT_DATA_SEED_IDS.JONY,
     handle: 'jony.ive@apple.dev',
-    isSyncEnabled: true,
+    isSyncEnabled: false,
     visibility: MessageChannelVisibility.SHARE_EVERYTHING,
     syncStage: MessageChannelSyncStage.MESSAGE_LIST_FETCH_PENDING,
   },
@@ -85,7 +85,7 @@ export const MESSAGE_CHANNEL_DATA_SEEDS: MessageChannelDataSeed[] = [
     type: MessageChannelType.EMAIL,
     connectedAccountId: CONNECTED_ACCOUNT_DATA_SEED_IDS.PHIL,
     handle: 'phil.schiler@apple.dev',
-    isSyncEnabled: true,
+    isSyncEnabled: false,
     visibility: MessageChannelVisibility.SHARE_EVERYTHING,
     syncStage: MessageChannelSyncStage.MESSAGE_LIST_FETCH_PENDING,
   },
@@ -98,7 +98,7 @@ export const MESSAGE_CHANNEL_DATA_SEEDS: MessageChannelDataSeed[] = [
     type: MessageChannelType.EMAIL,
     connectedAccountId: CONNECTED_ACCOUNT_DATA_SEED_IDS.JANE,
     handle: 'jane.austen@apple.dev',
-    isSyncEnabled: true,
+    isSyncEnabled: false,
     visibility: MessageChannelVisibility.SHARE_EVERYTHING,
     syncStage: MessageChannelSyncStage.MESSAGE_LIST_FETCH_PENDING,
   },
@@ -111,7 +111,7 @@ export const MESSAGE_CHANNEL_DATA_SEEDS: MessageChannelDataSeed[] = [
     type: MessageChannelType.EMAIL,
     connectedAccountId: CONNECTED_ACCOUNT_DATA_SEED_IDS.TIM, // Use TIM's connected account for shared inbox
     handle: 'support@apple.dev',
-    isSyncEnabled: true,
+    isSyncEnabled: false,
     visibility: MessageChannelVisibility.SHARE_EVERYTHING,
     syncStage: MessageChannelSyncStage.MESSAGE_LIST_FETCH_PENDING,
   },
@@ -124,7 +124,7 @@ export const MESSAGE_CHANNEL_DATA_SEEDS: MessageChannelDataSeed[] = [
     type: MessageChannelType.EMAIL,
     connectedAccountId: CONNECTED_ACCOUNT_DATA_SEED_IDS.TIM, // Use TIM's connected account for shared inbox
     handle: 'sales@apple.dev',
-    isSyncEnabled: true,
+    isSyncEnabled: false,
     visibility: MessageChannelVisibility.SHARE_EVERYTHING,
     syncStage: MessageChannelSyncStage.MESSAGE_LIST_FETCH_PENDING,
   },