v0.3.0 — Attachments

Some context can't be written as a prompt. Hand Carl the document instead.

Attach a file to a topic — paste it, drop it on the prompt box, or pick it — and its contents become part of how that topic is brewed. A long document is chunked and summarized into stored context that every future brew reads. Attachments can also come from a URL.

Processing runs as a durable workflow, so a large file survives a restart mid-upload instead of starting over.