Found live during the .5 multinode-pass run: this suite was hardcoded to
.116's exact app bundle (including the mempool stack), so any node missing
an app hard-failed instead of skipping — and a missing local fail() helper
(present in 3 sibling bats files, absent here) masked the real error as
"command not found" (exit 127). Add the same skip-if-absent idiom already
used in mempool.bats per-app, and define fail() locally like the others.
Verified: skips cleanly on .116 (no bitcoin-knots here), still exercises
real checks for apps that are installed.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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