v0.1.1

Bug-fix release. 0.1.0's spf53 deploy command was broken for anyone installing the published wheel rather than an editable dev checkout — fixed and verified against a real clean-venv wheel install.

Also fixes: a safety-guard defect that could let a large IPv6 block mask complete loss of a domain's IPv4 SPF authorization, a reentrant thread-pool deadlock on SPF records with many MX exchanges, an RFC 7208 10-lookup budget that was displayed but never enforced (and briefly over-enforced due to an off-by-one), several per-domain error-isolation gaps, a silent SNS notification failure on region mismatch, and multiple smaller correctness and cleanup fixes.