Release 1.11.0: end-user catalog, access requests, nested groups

Closes the end-user half of the directory and adds nested LDAP groups.

The directory could describe the lab but could not tell anyone what they had
or how to reach it, and several of the paths meant to do so were silently
returning nothing:

  - GET /api/discovery/me resolved groups from req.user.groups, which does not
    exist (req.user carries memberOf), so it returned only isPublic resources
    for every human caller -- "My Services" was blank for everyone. The same
    read made isDirectoryAdmin() false for real admins.
  - The portal's "Discover More Services" called the admin-gated endpoint and
    swallowed the 403, so it never rendered for non-admins at all.
  - Services reported no address, because /me had reimplemented getMyAccess
    without its parent-walking resolution.

Adds the catalog at /, self-service access requests, and admin access
visibility (per-resource counts, and the reverse "what can this user reach").

Nested groups come in two halves. groupOfNames.member already accepts a group
DN, so nesting needs no schema -- what it needs is resolution, which no
released OpenLDAP performs. The all-in-one image therefore builds slapd from a
pinned master commit for the nestgroup overlay, and the app computes the
closure itself when pointed at a server without it. Both paths are covered.

member-values is deliberately left out of nestgroup-flags: it expands `member`
when reading a group, which destroys the distinction between "listed here" and
"reachable through a nested group" and is not recoverable afterwards.

Full suite green in both resolution modes: 215 passed, 2 skipped.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/concepts-accounts.md

@@ -53,6 +53,29 @@ photo server. Once a group exists, add or remove members from the
 **Groups** page, and point the other app's "who's allowed in" setting at
 that group's name.
 
+### Groups inside groups
+
+A group can contain another group, not just people — the *Nested* tab on any
+group card. Everyone in the inner group counts as a member of the outer one,
+however many levels deep it goes.
+
+This is mostly a way to stop repeating yourself. Make one `developers` group,
+nest it into the handful of things developers should reach, and adding a new
+developer to that one group grants all of them at once — instead of adding them
+to each individually and slowly drifting out of sync. The app already does this
+for itself: super admins are nested into every resource's admin group, and each
+admin group into its access group, so "can administer it" always implies "can
+use it".
+
+Two things it won't let you do: put a group inside itself (directly or round a
+longer loop), and empty a group completely — every group must keep at least one
+member.
+
+A note if you also manage the directory by hand: a group's member list shows
+what is *directly* listed on it. Someone who gets in through a nested group is
+a real member but won't appear there — the **Nested** tab shows what is nested,
+and the API's `effective` view lists everyone who actually gets in.
+
 ## Every account's personal group
 
 Separately from the groups above, every single account — person or