Update dependency marshmallow to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
marshmallow (changelog)	==3.26.2 → ==4.3.1

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Release Notes

marshmallow-code/marshmallow (marshmallow)

v4.3.1

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Features:

• If by_value is enabled on an enum with a None value allow_none now defaults to True.
  Thanks :user:GeraldineGalindo for the suggestion (:issue:2985).

Bug fixes:

• marshmallow.validate.URL accepts a fragment that follows an empty path,
  e.g. https://example.com#frag (:pr:3016). Thanks :user:hdimer for the PR.

v4.3.0

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Features:

• Add pre_load and post_load parameters to marshmallow.fields.Field for
  field-level pre- and post-processing (:issue:2787).
• Typing: improvements to marshmallow.validate (:pr:2940).

v4.2.4

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Bug fixes:

• marshmallow.validate.URL and marshmallow.validate.Email accept Internationalized Domain Names (IDNs) (:issue:2821, :issue:2936).
  marshmallow.validate.Email also correctly rejects IDN domains with leading/trailing hyphens.
  Thanks :user:touhidurrr for the report.
• Typing: Fix typing of nested in marshmallow.fields.Nested (:pr:2935).

v4.2.3

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Bug fixes:

• Make marshmallow.fields.Number and marshmallow.fields.Mapping abstract base classes to
  prevent using them within Schemas (:issue:2924). Thanks :user:MartingaleCoda for reporting.
• Allow required to be set on marshmallow.fields.Contant (:issue:2900).
  Thanks :user:nosnickid for the report and :user:worksbyfriday for the PR.
• Fix marshmallow.validate.OneOf emitting extra pairs when labels outnumber choices (:issue:2869).
  Thanks: user:T90REAL for the report and :user:rstar327 for the PR.
• Fix behavior when passing a dot-delimited attribute name to partial for a key with data_key set (:pr:2903).
  Thanks :user:bysiber for the PR.
• Fix Enum field by-name lookup to only return actual members (:pr:2902).
  Thanks :user:bysiber for the PR.
• marshmallow.fields.DateTime with format="timestamp_ms" properly
  rejects bool values (:pr:2904). Thanks :user:bysiber for the PR.
• Fix typing of error_messages argument to marshmallow.fields.Field (:pr:1636).
  Thanks :user:repole for reporting and :user:dhruvildarji for the PR.

Other changes:

• Add ipaddress.* to marshmallow.Schema.TYPE_MAPPING (:issue:1695).
  Thanks :user:liberforce for the suggestion and :user:dhruvildarji for the PR.

v4.2.2

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Bug fixes:

• Fix behavior of fields.Contant(None) (:issue:2868).
  Thanks :user:T90REAL for reporting and emmanuel-ferdman for the fix.

v4.2.1

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Bug fixes:

• Fix validation of URLs beginning with uppercare FILE (:issue:2891).
  Thanks :user:thanhlecongg for reporting and fixing.

v4.2.0

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Other changes:

• many argument of Nested properly overrides schema instance
  value (:pr:2854). Thanks :user:jafournier for the PR.

v4.1.2

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Bug fixes:

• :cve:2025-68480: Merge error store messages without rebuilding collections.
  Thanks 카푸치노 for reporting and :user:deckar01 for the fix.

v4.1.1

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Bug fixes:

• Ensure URL validator is case-insensitive when using custom schemes (:pr:2874).
  Thanks :user:T90REAL for the PR.

v4.1.0

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Other changes:

• Add __len__ implementation to missing so that it can be used with
  validate.Length <marshmallow.validate.Length> (:pr:2861).
  Thanks :user:agentgodzilla for the PR.
• Drop support for Python 3.9 (:pr:2363).
• Test against Python 3.14 (:pr:2864).

v4.0.1

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v4.0.0

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