fix(types): make ElementAttributes.url optional

[Sysoev86]

Проблема

У элементов-анимоджи и стикеров в ответе сервера поля url нет. Из-за строгой модели ElementAttributes.url: str это даёт ValidationError и ломает синхронизацию при логине, когда в истории/сообщениях встречаются такие элементы.

Сервер реально отдаёт ElementAttributes без url, то есть модель сейчас строже самого протокола.

Изменение

 class ElementAttributes(CamelModel):
-    url: str
+    url: str | None = None

Делает url опциональным — по аналогии с уже опциональными полями в Element (from_, attributes). Обратной несовместимости нет: у элементов с url всё работает как прежде.

Контекст

Гоняем PyMax в проде как HTTP-шлюз к MAX. В 2.1.2 вы уже приняли два фикса, которые мы держали локальными патчами (LoginResponse.token → Optional и guard if response.token is not None в app.py) — спасибо! Это последний оставшийся патч, после мержа сможем выпилить локальное патчирование полностью.

Summary by CodeRabbit

• Bug Fixes
  • The element URL field is now optional instead of required, allowing elements to be created without providing a URL value.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: a416a86e-4090-4280-834d-599b44df450a

📥 Commits

Reviewing files that changed from the base of the PR and between 473218a and c60927d.

📒 Files selected for processing (1)

• src/pymax/types/domain/element.py

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📝 Walkthrough

Walkthrough

ElementAttributes.url in the domain type contract is changed from a required string field to an optional field accepting str | None with a default of None.

Changes

Element Attributes Type Update

Layer / File(s)	Summary
ElementAttributes.url optional field src/pymax/types/domain/element.py	ElementAttributes.url field type is updated from str to str | None with an explicit default of None, allowing URL to be optional.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A rabbit hops through types with glee,
Some URLs? Optional they'll be!
From must-have strings to None so kind,
The Element now leaves room to find. 🐰✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and accurately summarizes the main change: making ElementAttributes.url optional.
Description check	✅ Passed	The description covers the problem, solution, and context, but omits the required template sections like explicit type selection checkboxes and a testing example.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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