fix: provide meetingStartTime for test preview to prevent 'Meeting start time is required' crash (#24379)

* fix: provide meetingStartTime for test preview to prevent RR timestamp error

When Round Robin timestamp basis is set to START_TIME, the system requires
a meeting start time to calculate the interval for load balancing. Test
Preview doesn't have a real meeting time since it's just simulating the
routing logic.

This fix provides the current time (new Date()) as the meetingStartTime
when calling getOrderedListOfLuckyUsers in test preview mode. This allows
the Round Robin calculation to proceed using the current interval for
realistic ordering while still being in preview mode.

Fixes the 'Meeting start time is required' error that occurs when users
click Test Preview on routing forms with Round Robin timestamp basis set
to START_TIME.

Co-Authored-By: hariom@cal.com <hariombalhara@gmail.com>

* add comment

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

packages/trpc/server/routers/viewer/routing-forms/findTeamMembersMatchingAttributeLogicOfRoute.handler.ts

@@ -7,9 +7,9 @@ import type { ServerResponse } from "http";
 import type { NextApiResponse } from "next";
 
 import { enrichFormWithMigrationData } from "@calcom/app-store/routing-forms/enrichFormWithMigrationData";
+import { getLuckyUserService } from "@calcom/features/di/containers/LuckyUser";
 import { getUrlSearchParamsToForwardForTestPreview } from "@calcom/features/routing-forms/lib/getUrlSearchParamsToForward";
 import { enrichHostsWithDelegationCredentials } from "@calcom/lib/delegationCredential/server";
-import { getLuckyUserService } from "@calcom/features/di/containers/LuckyUser";
 import { entityPrismaWhereClause } from "@calcom/lib/entityPermissionUtils.server";
 import { fromEntriesWithDuplicateKeys } from "@calcom/lib/fromEntriesWithDuplicateKeys";
 import { findTeamMembersMatchingAttributeLogic } from "@calcom/lib/raqb/findTeamMembersMatchingAttributeLogic";
@@ -296,6 +296,8 @@ export const findTeamMembersMatchingAttributeLogicOfRouteHandler = async ({
           form,
           chosenRouteId: route.id,
         },
+        // During Preview testing we could consider the current time itself as the meeting start time
+        meetingStartTime: new Date(),
       })
     : { users: [], perUserData: null, isUsingAttributeWeights: false };
   const timeAfterGetOrderedLuckyUsers = performance.now();