Upgrade Python Deps

Automates the full cycle of upgrading Python dependencies with uv: locks to the latest compatible versions with a 7-day exclusion window for supply chain safety, syncs your environment, then runs mypy and your test suite to catch breakage. It's opinionated in a good way, stopping at the first failure and summarizing what changed before offering to commit. Most useful when you want to keep dependencies fresh without manually babysitting the upgrade-test-debug loop. The built-in guardrails around conflict resolution and the structured reporting of type errors make it less stressful than doing this by hand, though you'll still need to fix any actual breakage yourself.