Normalize raw URL separators after admitting an original relative ESM
request, before artifact path validation and root confinement. Preserve
the authored declaration and the existing encoded-separator checks.
Retain Node-backed static and dynamic loader controls and compare the
application graph with the historical importer already present on main.
Narrow PR #4323 to this remaining case after the upstream #4269 fix.
Signed-off-by: Jiakai Xu <jiakaiPeanut@gmail.com>