fix: improve type hints in __init__.py

[kalenmcmillan]

Summary
Improves type hints in src/tinfoil/__init__.py for better type safety, IDE support, and consistency with the rest of the codebase. Replaces incorrect dict = None and int = None patterns with Optional[dict] and Optional[int], and adds missing return type annotations.

Changes

• Add Optional import from typing and httpx import for return type annotations.
• Fix parameter type hints in TinfoilAI, AsyncTinfoilAI, and NewSecureClient constructors: change measurement: dict = None to measurement: Optional[dict] = None.
• Fix parameter type hints in _HTTPSecureClient.get() and post() methods: change headers: dict = None, params: dict = None, data: dict = None, json: dict = None, and timeout: int = None to use Optional[...].
• Add missing type hint for tf_client parameter in _HTTPSecureClient.__init__(): specify tf_client: SecureClient.
• Add return type annotations for get() and post() methods: both now return -> httpx.Response.

---

Summary by cubic

Improves type hints in src/tinfoil/init.py to use Optional for nullable params and adds return types for HTTP methods. This tightens type safety and improves IDE support.

• Refactors
  • Replace dict/int defaults set to None with Optional[...] across constructors and _HTTPSecureClient methods.
  • Add tf_client: SecureClient in _HTTPSecureClient.init and annotate get/post to return httpx.Response.
  • Add imports: Optional (typing) and httpx.

^{Written for commit 1627629. Summary will update automatically on new commits.}

[cubic-dev-ai]

No issues found across 1 file

[sachaservan]

@kalenmcmillan just got a chance to look at this. Thanks for your contributions.