These packages are published only to the opam overlay, not the public
opam-repository. Without the repo-add line a reader who runs opam install
gets nothing and has to hunt down the overlay URL by hand.

Across the packages monopam lint flagged: declare the libraries each
package actually uses (test-only ones scoped with-test, dev tools and
benches scoped with-dev-setup), drop the opam deps and dune (libraries)
entries nothing references, declare pin-depends for the wire and zarith
git pins so a standalone opam install can resolve them, and point the
five stale dune-project source URLs at the names sources.toml already
uses. The generated .opam files are regenerated to match.

Where monopam lint and merlint's project rules disagree, merlint wins:
[protocol] packages keep probe linked (E932), CSV-trace interop tests
keep csv (E825), and dev-scope deps carry the right filter (E943).

The few dead-lib reports that remain are monopam lint blind spots, not
real dead deps: usage reached only through an mdx README block (slirp),
through copy_files# (vz), or inside a library's own private modules
(builder), plus a tar gz dep kept live for a stub test still to write.

Comment reflow and header reindent produced by the new ocamlformat;
no code changes.