fix: restore timing fields to declarative schedule sync select

The merge with #4577 (scope declarative schedule sync to the current
environment) narrowed the existingDeclarativeSchedules findMany to a
select that omitted generatorExpression, timezone, windowDurationSeconds
and windowPercentage. The timingChanged comparison reads those fields to
decide whether to preserve the existing Redis job, so they must be
selected.

Author: carderne

apps/webapp/app/v3/services/createBackgroundWorker.server.ts

@@ -666,6 +666,10 @@ export async function syncDeclarativeSchedules(
       id: true,
       friendlyId: true,
       taskIdentifier: true,
+      generatorExpression: true,
+      timezone: true,
+      windowDurationSeconds: true,
+      windowPercentage: true,
       instances: {
         select: {
           environmentId: true,