[CLEAN] Synthetic Benchmark PR #26774 - feat: CalendarCache - filter generic calendars from subscription batch

[tomerqodo]

Benchmark PR calcom#26774

Type: Clean (correct implementation)

Original PR Title: feat: CalendarCache - filter generic calendars from subscription batch
Original PR Description: ## What does this PR do?

Configures SelectedCalendarRepository.findNextSubscriptionBatch to ignore generic calendars (holidays, contacts, shared, imported, resource calendars) by filtering based on their externalId suffixes.

Generic calendars are special calendars that shouldn't be subscribed to for sync because they're not user's personal calendars. For Google Calendar, these include calendars with suffixes like @group.v.calendar.google.com, @group.calendar.google.com, @import.calendar.google.com, and @resource.calendar.google.com.

Changes:

• Add GENERIC_CALENDAR_SUFFIXES constant in AdaptersFactory mapping providers to their generic calendar suffixes
• Add getGenericCalendarSuffixes() method to AdapterFactory interface
• Update findNextSubscriptionBatch to accept and use genericCalendarSuffixes parameter to filter out calendars with matching externalId suffixes using Prisma's NOT + endsWith
• Update CalendarSubscriptionService.checkForNewSubscriptions to pass generic calendar suffixes from the adapter factory

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I confirm automated tests are in place that prove my fix is effective or that my feature works.
• N/A - No documentation changes required.

How should this be tested?

1. Unit tests have been added/updated for both SelectedCalendarRepository and CalendarSubscriptionService
2. Run tests: TZ=UTC yarn test packages/features/selectedCalendar/repositories/SelectedCalendarRepository.test.ts packages/features/calendar-subscription/lib/__tests__/CalendarSubscriptionService.test.ts
3. To verify in production: Check that calendars with generic suffixes (e.g., holiday calendars ending in @group.v.calendar.google.com) are not being pulled for subscription

Human Review Checklist

• Verify the Prisma query handles AND: undefined correctly (should be ignored when no suffixes provided)
• Verify the list of Google Calendar generic suffixes is complete for your use case
• Consider if Office 365 calendars need similar suffix filtering (currently empty array)

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Link to Devin run: https://app.devin.ai/sessions/fbf759af4f2242afb079020f2ff63245
Requested by: Volnei Munhoz (@volnei)
Original PR URL: calcom#26774

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