🪲 BUG-#69: Forward port/ssl overrides through auto-discovery factories

[FernandoCelmer]

Summary

• Email(port=..., ssl=...) kwargs are now forwarded through EmailFactories.from_address and EmailFactories.from_env, so they override the values returned by resolve_imap_host
• Switched port/ssl defaults to Optional sentinel (None) on both Email.__init__ and the factories — distinguishes "user passed default" from "user did not pass anything"
• Tests cover: override applied, omission keeps discovered values

Closes #69

Test plan

• pytest tests/test_email.py — 29 passed

[FernandoCelmer]

🔍 Code Review

Code issues found: 0

Correct fix. Switching port/ssl defaults to Optional[None] cleanly distinguishes "user passed default" from "user passed nothing" — the only sound way to detect intent in Python without sentinels. Forwarded through both from_address and from_env, and Email._resolve propagates the kwargs to every auto-discovery branch.

Test coverage proves both directions: override applied, omission keeps discovered values. With #74 already in, this is what unblocks Email("u@hostinger.com", "pw", port=2143, ssl=False) style configs end-to-end.

Closes #69.