Cheri Coq dependecy issues

[dc-mak]

from https://github.com/rems-project/cerberus/actions/runs/12141123884/job/33852477899#step:5:191

 Error:  Package conflict!
  * No agreement on the version of coq:
    - cerberus-cheri → coq-bbv < 1.5 → coq < 8.14~
    - cerberus-cheri → coq-cheri-capabilities → coq = 8.19.0
  * No agreement on the version of ocaml:
    - (invariant) → ocaml-base-compiler = 4.14.1 → ocaml = 4.14.1
    - cerberus-cheri → coq-bbv < 1.5 → coq < 8.11~ → ocaml < 4.02.0
No solution found, exiting
    You can temporarily relax the switch invariant with `--update-invariant'

[ZippeyKeys12]

If you make coq-bbv >= "1.5", it becomes:

#=== ERROR while compiling cerberus-cheri.~dev ================================#
# context              2.1.2 | linux/x86_64 | ocaml-base-compiler.4.14.1 | pinned(git+file:///home/runner/work/cerberus/cerberus#HEAD#e04776a3)
# path                 ~/.opam/with_coq/.opam-switch/build/cerberus-cheri.~dev
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune build -p cerberus-cheri --profile=release -j 3 @install
# exit-code            1
# env-file             ~/.opam/log/cerberus-cheri-2055-992432.env
# output-file          ~/.opam/log/cerberus-cheri-2055-992432.out
### output ###
# [...]
# (cd _build/default/coq/Morello && /home/runner/.opam/with_coq/bin/coqdep -boot -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/btauto -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/cc -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/derive -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/extraction -I /home/runner/.opam/with_coq/lib/coq/../coq-core/p[...]
# Warning: in file MorelloCapsGS.v, library
#          Coq.ZArith.Zdigits is required and has not been found in the loadpath!
#          [module-not-found,filesystem,default]
# (cd _build/default && /home/runner/.opam/with_coq/bin/coqc -q -w -deprecated-native-compiler-option -w -native-compiler-disabled -native-compiler ondemand -boot -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/btauto -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/cc -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/derive -I /home/runner/.opam/with_coq/lib/coq/.[...]
# File "./coq/Common/Utils.v", line 7, characters 0-[34](https://github.com/rems-project/cerberus/actions/runs/12153602944/job/33893044811?pr=735#step:5:35):
# Error: Cannot find a physical path bound to logical path Coq.ZArith.Zdigits.
# 
# (cd _build/default && /home/runner/.opam/with_coq/bin/coqc -q -w -deprecated-native-compiler-option -w -native-compiler-disabled -native-compiler ondemand -boot -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/btauto -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/cc -I /home/runner/.opam/with_coq/lib/coq/../coq-core/plugins/derive -I /home/runner/.opam/with_coq/lib/coq/.[...]
# File "./coq/Morello/MorelloCapsGS.v", line 6, characters 0-34:
# Error: Cannot find a physical path bound to logical path Coq.ZArith.Zdigits.
# 



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
┌─ The following actions failed
│ λ build cerberus-cheri ~dev
└─ 
┌─ The following changes have been performed
│ ∗ install cerberus-lib ~dev
└─

from https://github.com/rems-project/cerberus/actions/runs/12153602944/job/33893044811?pr=735#step:5:33

[vzaliva]

Initial analysis shows that it is due to a change in the coq-cheri-capabilities package. Before, there was no coq version restriction. I am considering how to fix it. Last working commit for coq-cheri-capabilities was 2f02c44ad061d4da30136dc9dbc06c142c94fdaf. Because it is not released via OPAM we depend on the latest version. Perhaps we should make it depend on the last known commit?