When true, the caller opts into automatic deduplication: a colliding
shortcode is suffixed (arrow → arrow2) until unique, and a create
with neither a shortcode nor a usable name gets a random 16-char id — so
the resolve can never fail. When false/absent, a collision (or a
name-less create) is rejected.
OptionalisWhether this create is an explicit Foundry duplicate (_stats.duplicateSource).
A duplicate always carries the source shortcode, so a collision is
expected and auto-suffixed even without dedupe.
OptionalmakeGenerates a fresh id in the Foundry-id charset ([A-Za-z0-9]), used only
for the "no shortcode and no usable name, dedupe on" corner. Injected by
the Foundry-layer caller (the fvttRandomId shim) so this resolver stays
Foundry-free and unit-testable; required to reach that branch.
Options governing how resolveShortcodeKey handles a collision or a missing shortcode.