chore(deps): update stalwartlabs/stalwart docker tag to v0.13.4

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This PR contains the following updates:

Package	Update	Change
stalwartlabs/stalwart	patch	v0.13.3-alpine -> v0.13.4-alpine

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Release Notes

stalwartlabs/stalwart (stalwartlabs/stalwart)

v0.13.4

Compare Source

[0.13.4] - 2025-09-30

If you are upgrading from v0.11.x or v0.12.x, this version includes breaking changes to the message queue and MTA configuration. Please read the UPGRADING.md file for more information on how to upgrade from previous versions.

Added

Changed

• JMAP: Protocol layer rewrite for zero-copy deserialization and architectural improvements.

Fixed

• JMAP: References to previous method fail when there are no results (#​1507).
• JMAP: Enforce quota checks on Blob/copy.
• JMAP: Mailbox/get fails without accountId argument (#​1936).
• JMAP: Do not return invalidProperties when email update doesn't contain changes (#​1139)
• IMAP: Unbounded memory allocation in request parser.
• IMAP: Wrong permission checked for GETACL.
• iTIP: Include date properties in REPLY (#​2102).
• OIDC: Do not set username field if it is the same as the email field.
• Telemetry: Fix calculateMetrics housekeeper task (#​2155).
• Directory: Always use rsplit to extract the domain part from email addresses.

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