perf: handleChildrenEventTypes createManyAndReturn

[ThyMinimalDev]

What does this PR do?

• Fixes #XXXX (GitHub issue number)
• Fixes CAL-XXXX (Linear issue number - should be visible at the bottom of the GitHub issue description)

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Summary by cubic

Optimized child event type creation by using createManyAndReturn in handleChildrenEventTypes. This removes a follow-up fetch and reduces transaction time.

• Performance
  • Return created events directly from createManyAndReturn.
  • Eliminates the extra findMany used to map id/userId.
  • Preserves skipDuplicates behavior.

^{Written for commit b256388. Summary will update automatically on new commits.}

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Project	Deployment	Preview	Comments	Updated (UTC)
cal-companion	Ready	Preview	Comment	Dec 5, 2025 8:31pm

[cubic-dev-ai]

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