[yusiwen]

What changed

docs/roadmap.md, B1's entry only:

• the Picked up line records that the endpoint became required in fix(memory): require a base_url for the hindsight backend #301, and that the adapter's
  contract moved to #302 when [memory] Local store, wired recall, and one explicit writer #293 closed;
• the Delivered note no longer points at "S4 above" (which now names nothing) and links [memory] Align the Hindsight adapter with a real deployment #302.

Why

#293 and #297 were closed in this session's bookkeeping: #293 delivered S1/S2/S3 and split S4 out, #297
met its whole acceptance list with its out-of-scope items living in B4 or waiting on a measurement. The
roadmap still referred to the split-out slice by a name that no longer resolves to anything, which is
exactly the kind of dangling reference the document's own contract is meant to prevent.

Verification

• grep -n "302" docs/roadmap.md → the two links land in B1's Picked up and Delivered lines.
• The total-row command still prints 40:
  grep -Ec '^\| [A-H][0-9] \| .* \| (Delivered —|Refuted|In progress|Not started)' docs/roadmap.md.
• git log --format='%h %G? %s' → G.

Honest scope

Docs only. No code, no test count change (1230 test functions in the main module).

Refs #293, #297, #302