v0.4.12: fix the CI lint failure so the image builds and publishes Fixes the CI lint failure introduced by v0.4.11 so the image builds and publishes. - v0.4.11 added make lint to CI for the first time, which surfaced a pre-existing flake8 E501: a 103-character line in src/mailboxd/server.py. The lint job failed and the image build and publish steps, which depend on it, were skipped. Wrapped the line so flake8 passes. No behavior change.