chore(catalog): refresh to command-code@1.30.1 + docs: define Deals intelligence slice

- catalog refresh: facts 1.30.0 -> 1.30.1, snapshot gpt-5.5 200k -> 400k, deals 2026-08-20 -> 2026-08-21
- CONTEXT.md: add Core (auto-registration, [CMD], auth, provider/*) and Deals intelligence glossary entries
- ADR-0004: excisable slice via src/deals, visible unavailable signal, zero-step delivery, refresh resilience (accepted)

Part of #39, prefactor for #40.