fix(calendar): add error handling for outbound Google Calendar sync

[cyphercodes]

Summary

Add proper error handling to prevent silent failures when syncing events to Google Calendar.

Problem

As described in #10535, outbound sync from Huly to Google Calendar was failing silently due to:

1. Unhandled promise rejections in the webhook handler
2. Missing try/catch blocks around Google API calls
3. Empty catch blocks that swallowed errors

Changes

• main.ts: Add .catch() handler to log sync failures with event context
• outcomingClient.ts: Add try/catch in create() method to log Google API insert errors with calendarId, eventId, and error details
• outcomingClient.ts: Improve error handling in remove() method to properly log get/delete errors

Testing

These changes ensure that:

• Sync failures are properly logged with context (eventId, workspace, error message)
• Google API errors include the HTTP status code for easier debugging
• Errors are no longer silently swallowed

Fixes #10535

[huly-github-staging]

Connected to Huly®: UBERF-16111

[ArtyomSavchenko]

@cyphercodes Could you please change target branch to develop?
The develop branch is used for development and is the default branch for new contributions.

[cyphercodes]

@ArtyomSavchenko Done! Changed target branch to develop. Thanks for the review.

[ArtyomSavchenko]

@cyphercodes The changes look good to me.
Thank you for the contribution.