Improve type annotations for stricter type checking (ty)

[amureki]

Summary by CodeRabbit

Release Notes

• Chores
  • Internal code improvements and type safety enhancements to improve code reliability and maintainability.

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📝 Walkthrough

Walkthrough

The changes introduce internal type-casting adjustments and a minor refactoring pattern in model_bakery/baker.py. Modified assignment logic for model instances, added explicit type casts for through-model and remote field returns, and replaced direct get+assignment patterns with walrus operators for generator resolution.

Changes

Cohort / File(s)	Summary
Type casting and assignment refactoring model_bakery/baker.py	Modified Baker.__init__ to directly assign _model instead of casting to type; added type cast for through_model in _handle_m2m; added explicit cast for returned remote field in _remote_field; refactored generator resolution in generate_value using walrus operators (3 occurrences)

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 With whiskers twitched and nose held high,
Our baker's code now casts with grace,
The walrus := makes values fly,
Type-safe logic finds its place,
A hop, a skip—perfection's sigh!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: improving type annotations in the codebase for stricter type checking, which is reflected throughout the summary (casting adjustments, walrus assignments, explicit type casts).

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✨ Finishing touches

• 📝 Generate docstrings

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