feat: add received_for to inbound email and received event types

[lucasfcosta]

Adds the received_for field to the inbound email and email.received event types, matching the API.

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Summary by cubic

Add the received_for field to inbound email and email.received event types to match the API, and bump resend-rs to 0.27.0. This tells consumers which address an email was received for, including forwarded cases.

• New Features

  • Added received_for: Vec<String> with #[serde(default)] to receiving::types::InboundEmail and events::Received.
  • Updated tests to assert parsing of received_for.

• Dependencies

  • Bumped getrandom to 0.4.3, jiff to 0.2.29, and svix to 1.96.1.

^{Written for commit ea4e91d. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Requires human review: Adds a new required field to event types, which could break consumers expecting the old schema. Even with serde default, this is a schema change for an API SDK.

Re-trigger cubic</sub>

[cubic-dev-ai]

0 issues found across 2 files (changes from recent commits).

_{Re-trigger cubic}