v0.1.2

Removes the key-minting tool (9 tools now); Bots are provisioned with hermes -p <bot> openmail setup --inbox <address>, which writes an inbox-scoped key to the profile's .env. Setup asks how to gate senders (allowlist, OpenMail sender rules, or later). Key scope read from /v1/me. Fixes attachment sends (multipart form). Skill rewritten around the native tools.