email list sync button uses new email-sync handler, job duration logging

Rewired EmailList sync button to call /email/accounts/:id/sync instead
of the old gmail-sync job. Shows sync button for connected and synced
accounts. Allow manual incremental sync for synced accounts.

Added duration logging to queue runner: start/complete/fail markers
with elapsed time.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/servers/api/email/accounts.ts

@@ -135,7 +135,6 @@ accountsRouter.post('/:id/sync', async (ctx) => {
 
   if (account.status === 'queued') throw BAD_REQUEST('Sync is already queued');
   if (account.status === 'syncing') throw BAD_REQUEST('Account is already syncing');
-  if (account.status === 'synced') throw BAD_REQUEST('Account is already synced — incremental syncs run automatically');
 
   // Resolve auth before enqueueing
   const authResult = await resolveAuth(user.id, account.authType, account.email, account.credentials as Record<string, unknown>);