Exercises the 3 MCP handlers that work MariaDB-only (no Qdrant
dependency): brain_remember writes + returns id, brain_list
surfaces it, brain_forget removes. Negative case: brain_forget on
a non-existent id returns a proper error response (not TypeError).
brain_recall is out of scope — needs the Qdrant collection +
embedding pipeline.
Implementation note: handlers use `type` + workspace context for
scoping, not a `scope` parameter; the test matches the actual
signatures.
Closes tasks.lthn.sh/view.php?id=96
Co-authored-by: Codex <noreply@openai.com>
Co-Authored-By: Virgil <virgil@lethean.io>
