Second split under docs/swarm/, following the shape docs/turn-loop/ and
docs/web-ui/ already use.
The README keeps the `## Swarm CA` heading rather than deleting it: an
existing cross-reference targets that anchor, and a heading is the
cheapest thing to preserve. It now carries the one-paragraph summary and
a pointer, so a reader who lands on the anchor still arrives somewhere
that answers the question.
The CA page also absorbs three things that were true but undocumented —
why the trust bundle rather than the bare intermediate (openssl will not
terminate a chain at a non-self-signed anchor without -partial_chain),
that autoConfigure derives from enableAllLocalDefaults, and that the
name constraint excludes both IP families because a permitted-DNS-only
constraint says nothing about IP SANs.
Both worked from the flat docs/swarm.md and resolve one directory
short from docs/swarm/README.md: snapshot-store.md stayed in docs/,
and swarm-controller/README.md is at the repo root.
`docs/swarm.md` becomes `docs/swarm/README.md` and the shared-services
material moves to `docs/swarm/services.md`, following the shape
`docs/turn-loop/` and `docs/web-ui/` already use. The README keeps a
pointer so the reading path is unbroken.
Every referrer moved with it — five docs pages, two option descriptions
in swarm.nix, and CLAUDE.md's reading path. A pointer to a file that
moved is worse than one to a file that was deleted: the content still
exists, so the reader concludes the note is wrong rather than the path.
