chore: upstream integration for 4.1 (epic) #305

Why

Upstream fixes released after GA are adopted in 4.1 (master plan Decision 3a).

In scope

The child cards.

Out of scope

Upstream work that qualifies before rc.1.

Acceptance criteria

• Every child card is closed or moved

Dependencies

Blocked by: None

Blocks: None

Plan

• Release: 4.1.0
• Workstream: ws:upstream
• Card: EP-U41 in the card inventory
• Sources: Master plan (docs(plans): v4 GA master plan, supersession ledger and v5 registers #290) Decision 3a

Verification

Every child card is closed.