Wire the bridges to the codec's new discriminator check (merged down from
dsh-hook-protocol): each bridge passes its firing `point` as `expectedEventName`
to runHook, so a hook whose `hookSpecificOutput.hookEventName` names a different
event has its event-scoped fields discarded. Bridge-level guard test: a
PreToolUse hook emitting a UserPromptSubmit-labeled deny no longer denies the
tool (proven red without the wiring, then reverted).
Tianyi Cui
253eded47b