README cleanup, default TTL to 10 days, terminal banner
README: cut the Discord-specific Commands table and "ephemeral" out of the top-level README, it's UI detail for one delivery adapter, not core material. Moved it into docs/discord-adapter.md instead, with a one-line pointer left in its place. Also had a whole README rewrite sitting uncommitted locally from an earlier pass, that's now actually pushed. Default address TTL changed from 7 to 10 days: config.ts default, every doc mention, the static Discord command description, .env.example. Added a small ASCII flame banner (src/banner.ts) printed on startup by both terminal entrypoints, shared so it's ready to reuse for a CLI later without redrawing it. docs/images/ scaffolded for a demo screenshot, README has a commented-out image tag ready to uncomment once one's added.
10 files changed+74−72
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