Boarded with #11741 (a duplicate fix for the same underlying issue #11739). Compared both implementations directly: this one is technically superior — a dedicated resolveIncomingCorrelationId() helper that strips CRLF (header-injection prevention) and bounds length to 1-256 chars, with 4 unit tests covering those edge cases. #11741's simpler `header || generateRequestId()` has no sanitization. Closing #11741 with credit. Validated in a combined worktree: typecheck:core, check:dashboard-typecheck, check:file-size, check:changelog-integrity, check:complexity, check:cognitive-complexity, check:cycles, check-deps all green; 84/84 + 43/43 focused tests pass across this batch. Thanks for the careful sanitization work.
