* fix(reference): join internal symlink targets with the inventory NFC normalizer
checkSymlinks resolved an internal symlink target with bare
posix.normalize and looked the result up in the inventoried path set.
A target that a filesystem reports in NFD (macOS readlink commonly
does) joined to an NFD spelling while the inventory holds NFC, so
validation reported "Internal symlink target must resolve to an
inventoried entry" for a target the inventory actually contains.
Route the join through normalizeJoinedLogicalPath, the same inventory
identity normalizer #1513 applied to the runtime, HTML/module, and
import joins from #1488. The feature-seed NFKC query fold stays a
query.
Refs #1488
* fix(reference): preserve source spelling during symlink lookup
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Co-authored-by: morluto <76467478+morluto@users.noreply.github.com>
