[MINOR] Fix import-boundary consumer scan skipping non-consumer dependencies

[voidmatcha]

What is this PR for?

Fix CI failure introduced by #5469 (already merged as 788d45a). Its findReactNotebookConsumerViolations scan restricted recursion to consumers.has(target), but a consumer's own dependency (e.g. a helper file) is never itself added to consumers, so the scan stopped detecting forbidden transport imports reached through it. Reverts to the original unconditional recursion.

What type of PR is it?

Bug Fix

Todos

What is the Jira issue?

How should this be tested?

npm run test:notebook-core: the 3 previously-failing cases (helper/javascript/require-outside) now pass.

Screenshots (if appropriate)

N/A

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[tbonelee]

Merged into master