[dev]: Replace mypy with ty (experimental)

[amureki]

Describe the change
Replace mypy with ty as the primary type checker with stricter type checks.

PR Checklist

• Change is covered with tests
• CHANGELOG.md is updated if needed

Summary by CodeRabbit

• Chores
  • Migrated the project type-checker from mypy to ty and updated dev dependencies.
  • Updated CI, build/lint targets, and project configuration to use the new tool.
  • Added typing suppressions and minor internal typing adjustments to reduce false-positive type warnings for optional integrations.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR migrates the project from mypy to ty as the primary type checker, updating CI, Makefile, and pyproject config, and adds inline ty/misc type-ignore annotations across several modules while refactoring recipe loading to avoid casts and adjust return typing.

Changes

Cohort / File(s)	Summary
Build & Configuration .github/workflows/ci.yml, Makefile, pyproject.toml, CHANGELOG.md	Replace mypy with ty in CI, Makefile lint target, and dev dependencies; replace [tool.mypy] with [tool.ty.rules] and add new ty rule keys; document change in CHANGELOG.
Module fallback typing model_bakery/generators.py	Added # type: ignore[misc,assignment] to several optional PostgreSQL-related module-level fallbacks (ArrayField, HStoreField, CICharField, CIEmailField, CITextField, BigIntegerRangeField, DateRangeField, DateTimeRangeField, DecimalRangeField, IntegerRangeField).
Dynamic import typing model_bakery/random_gen.py	Added # ty: ignore[unresolved-import] annotations to psycopg/psycopg2 dynamic import blocks used by range generator functions; no runtime behavior changes.
Typing silence in baker model_bakery/baker.py	Added # ty: ignore[no-matching-overload] to a through-model creation call in _handle_m2m to silence overload typing errors; behavior unchanged.
Recipe loader refactor model_bakery/recipe.py	_load_recipe_from_calling_module renamed parameter to recipe_name: str and returns Recipe[Any]; removed casts and Model import; foreign_key updated to use a resolved_recipe variable and return RecipeForeignKey(resolved_recipe, ...).

Sequence Diagram(s)

(Skipped — changes are typing/tooling/configuration and small internal refactors without new multi-component control flow.)

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related PRs

• Improve type annotations for stricter type checking (ty) #572 — Related typing edits in baker.py (notably _handle_m2m) that overlap with typing-ignore changes in this PR.

Poem

🐰 From mypy's meadow to ty's bright glen,

I hop with comments that silence when,
Recipes cleansed of casts and fear,
Imports annotated, warnings clear,
A tiny rabbit cheers the type frontier.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 62.50% 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 clearly and concisely summarizes the main change: replacing mypy with ty as the type checker for development purposes.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}