blob is a dead-end type: no literal in either mode, seed-unsupported, so
a blob column can only ever hold NULL. It rode along as the engine's
fourth storage class and never got the pedagogical scrutiny UUIDs
(excluded) and compound PKs (defended) received — and there's nothing
natural to do with binary data in a TUI teaching tool. Drop it → a
nine-type vocabulary.
Records the removal scope (Type::Blob + Value/CellValue::Blob + the
base64 CSV path + completion/grammar slot + the help/hint user-facing
strings + the binder refusal, whose message also carried a "DSL"
copy-rule bug subsumed by deletion) and the backward-compat migration:
the ADR-0015 framework's first real use — a v1→v2 migrator converts
type: blob → text and forces a .db rebuild from the migrated text.
convert-to-text chosen over drop-the-column (CSV rewrites) and
refuse-to-load. Updates the ADR index.
claude@clouddev1
1a2002dbf6