Bump the version and fix the CI image

metacpan/metacpan-api, which the build ran in, switched to an
unprivileged user. apt-get cannot write /var/lib/apt/lists there and
gives up with "Permission denied", so cmake never got installed and the
collocatordb build died with "cmake: command not found". The image has no
sudo either, and a job cannot ask for another user, so this needs a
different image: the official perl one runs as root and brings cpanm,
pinned to its distribution so that an upstream rebuild cannot move
rocksdb underneath us.

Two things follow from the change. morbo comes from the local lib now
rather than from the image, so the server test needs perl5/bin on the
PATH, and the cache key carries the image, because perl5/ only holds what
cpanm found missing in the image it was built in.

A failed package installation is also reported where it happens now
instead of surfacing much later as a missing command.

Verified with gitlab-ci-local: all 12 tests pass, against the rocksdb 9.10
of trixie.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Change-Id: I4ed59866b57aa10e39c28390a9a9e2b7d74780e5
diff --git a/script/derekovecs-server b/script/derekovecs-server
index 9f5dbec..184bed0 100755
--- a/script/derekovecs-server
+++ b/script/derekovecs-server
@@ -1,6 +1,6 @@
 #!/usr/bin/env perl
 
-our $VERSION = '0.97';
+our $VERSION = '0.98';
 
 use IDS::DeReKoVecs::Read;
 use Mojolicious::Lite;