Enable ruff TC rules (type-checking imports)

[iMicknl]

Summary

• Move type-only imports into TYPE_CHECKING blocks across 13 files
• Quote type expressions in cast() calls
• Reduces runtime import overhead without changing behavior

Test plan

• ruff check . passes
• pytest — 280 tests pass
• mypy passes

[Copilot]

Pull request overview

Enables Ruff’s flake8-type-checking (“TC”) rules and updates the codebase to comply by moving type-only imports behind TYPE_CHECKING guards and avoiding runtime-evaluated type references (notably in cast() calls), reducing import-time overhead.

Changes:

• Enable Ruff TC rules in pyproject.toml.
• Move type-only imports into if TYPE_CHECKING: blocks across the codebase.
• Quote type expressions in cast() calls to avoid runtime type dependencies.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
utils/generate_enums.py	Move model imports to TYPE_CHECKING and quote cast() type expressions.
pyproject.toml	Enable Ruff TC rules.
pyoverkiz/types.py	Guard Callable import behind TYPE_CHECKING.
pyoverkiz/response_handler.py	Guard aiohttp.ClientResponse import behind TYPE_CHECKING.
pyoverkiz/obfuscate.py	Guard JSON type import behind TYPE_CHECKING.
pyoverkiz/models.py	Guard typing-only imports and quote cast() type expressions.
pyoverkiz/enums/base.py	Quote cast() type argument for Self.
pyoverkiz/client.py	Guard typing-only imports and quote cast() type expressions.
pyoverkiz/auth/strategies.py	Guard typing-only imports and quote cast() type expressions.
pyoverkiz/auth/factory.py	Guard typing-only imports (ssl, ClientSession, ServerConfig).
pyoverkiz/auth/base.py	Guard Mapping import behind TYPE_CHECKING.
pyoverkiz/action_queue.py	Guard typing-only imports behind TYPE_CHECKING.
pyoverkiz/_case.py	Guard Callable import behind TYPE_CHECKING.

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