Reads the kernel's notes since a checkpoint and names the refusal: a
status for the route and a line for the operator. CUBE's own status is
taken from the note when it carries one; a file the lookup could not
find is 404; anything else is the kernel's own failure, 502, so a 404
never again stands for "something went wrong".
Parameters
filePath: string
The file asked for.
notes: readonlystring[]
The kernel's error notes since the read began, oldest first.
Reads the kernel's notes since a checkpoint and names the refusal: a status for the route and a line for the operator. CUBE's own status is taken from the note when it carries one; a file the lookup could not find is 404; anything else is the kernel's own failure, 502, so a 404 never again stands for "something went wrong".