[irvingpop]

Summary

• Docker image: python:3.14.9-slim-trixie -> python:3.14.10-slim-trixie (security fixes). CI and pyproject.toml use 3.14, so they need no change.
• Major updates: multidict 6.9.1 -> 7.2.1, zipcodes 1.3.0 -> 3.0.0, ruff 0.15.22 -> 0.17.3
• In-range updates: certifi, coverage, pytest, pytest-asyncio

Fixes for major updates

• zipcodes 3.0: is_real() now raises ValueError on a bad format. _random_zip() started its loop with "0", so /lunch with no input crashed. The loop now makes a 5-digit zip before the first check. One test matched an error message that changed; the match is now less strict.
• ruff 0.17: formats Python code blocks in Markdown. 3 docs files are reformatted so the CI format check passes.

Test plan

• ruff check and ruff format --check pass
• pytest: 249 passed, 10 skipped
• Docker image builds

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