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/ldap.md

@@ -59,8 +59,41 @@ way or use `slappasswd -h '{SSHA512}'`.
 Groups are `cn=<name>,ou=groups,<base>` (`groupOfNames`) with a `member`
 attribute listing member DNs. The `memberOf` overlay populates reverse
 membership (`memberOf` on the user); `refint` keeps it consistent on
-add/remove. **Admin permission checks read the group's `member` list**, not
-`memberOf` on the user.
+add/remove.
+
+Note that `groupOfNames` requires **at least one member**, which has two
+consequences worth knowing: whoever creates a group is automatically seeded
+into it, and removing the last member (user *or* nested group) is refused with
+a 409 rather than leaving an invalid entry behind.
+
+### Nested groups
+
+A `member` DN may be another group's, not just a user's — that is how nesting
+is stored, with no extra schema. Everyone in the nested group is a member of
+the outer one, at any depth. Manage it on the **Groups** page under each
+group's *Nested* tab, or via the API:
+
+```
+PUT    /api/group/:group/nested/:child    nest :child inside :group
+DELETE /api/group/:group/nested/:child    un-nest
+GET    /api/group/:group/effective        direct users, nested groups, and the
+                                          full transitive set of users
+```
+
+Cycles are refused (409) rather than truncated — a loop makes "who is in this
+group" unanswerable. Two standing relationships are wired automatically: the
+cross-app `app_super_admin` is nested into every resource's `<slug>_admin`
+group, and each `<slug>_admin` into its `<slug>_access` group, so administering
+something implies being able to use it.
+
+**Resolving nesting is a client-side job on stock OpenLDAP.** No 2.6.x release
+can evaluate nested groups; `memberOf` and a `(member=X)` filter both return
+direct membership only. The bundled slapd is therefore built from source with
+the `nestgroup` overlay (see *Modules + overlays* below), and the app is told so
+via `ldap.nestedGroupsServerSide`. Against any other server the app computes the
+closure itself — same answers, more queries. Either way, **never read `memberOf`
+directly to make an access decision**; use `utils/user_groups.js`'s `groupCns()`,
+which is correct in both modes.
 
 ### Personal groups
 
@@ -75,15 +108,15 @@ instead from the owning user's own profile page ("Members of `<uid>`'s
 group", admin-only) — add other accounts as supplementary members, e.g. to
 share write access to files owned by this group.
 
-The SSO requires three groups (seeded automatically by the entrypoint /
-`install.sh`):
+The SSO seeds these groups automatically (entrypoint / `install.sh`):
 
 | Group | Grants |
 |-------|--------|
+| `app_super_admin` | cross-app super admin. Nested into the three below, so its members hold those rights transitively rather than by a special case in app code — and the privilege is visible to LDAP-native consumers (SSSD, sudo) too. |
 | `app_sso_admin` | full admin (users, groups, settings) |
 | `app_sso_oauth_admin` | OAuth client management |
 | `app_sso_invite` | invitation management |
-| `app_sso_service_account` | not a permission — marks a `posixAccount` as a non-person service account (see *Service accounts* below) |
+| `app_sso_service_account` | not a permission — marks a `posixAccount` as a non-person service account (see *Service accounts* below). Deliberately **not** nested into, since it changes how an account is displayed rather than what it may do. |
 
 ## TLS (LDAPS / StartTLS)
 
@@ -308,11 +341,37 @@ needs:
 
 - **Modules:** `pw-sha2` (the app stores user passwords as `{SSHA512}`),
   `ppolicy`, `memberof`, `refint`.
+- **Optional — `nestgroup`:** server-side nested-group evaluation. Not in any
+  released OpenLDAP (added to master as ITS#10161 in March 2024; 2.7 is still
+  unreleased), so the bundled image builds slapd from a pinned upstream commit.
+  Without it the app resolves nesting itself and everything still works — leave
+  `ldap.nestedGroupsServerSide` at `false`. With it, set that to `true` and
+  configure:
+
+  ```
+  overlay         nestgroup
+  nestgroup-base  ou=groups,<base>
+  nestgroup-flags member-filter memberof-filter memberof-values
+  ```
+
+  Flags are **space-separated**; the comma form the man page's `{a, b, c}`
+  notation suggests is rejected. `member-values` is deliberately omitted — it
+  expands the `member` attribute when reading a group, which destroys the
+  distinction between "listed here" and "reachable through a nested group", and
+  the raw values are then unrecoverable. Transitive answers come from the filter
+  flags and from `GET /api/group/:group/effective`.
+
+  One more consequence of building from master: it ships **LMDB 1.0.0**, whose
+  on-disk format is mutually unreadable with the 0.9.x in 2.6.x
+  (`MDB_INVALID: File is not an LMDB file`). Moving a directory between the two
+  is a `slapcat` → `slapadd` reload, not a restart.
 - **Custom schema:** the `theta42Person` auxiliary objectClass with
   `dateOfBirth` — see `ops/ldap-setup.sh` for the LDIF.
 - **Directory tree:** `ou=people`, `ou=groups`, `ou=policies` under the base DN,
   a default `pwdPolicy` at `cn=ppolicy,ou=policies,<base>`.
-- **Required groups:** `app_sso_admin`, `app_sso_invite`, `app_sso_oauth_admin`.
+- **Required groups:** `app_sso_admin`, `app_sso_invite`, `app_sso_oauth_admin`,
+  and `app_super_admin` (the cross-app super-admin group; the bundled entrypoint
+  also nests it into the first three).
 
 `ops/ldap-setup.sh -p <admin-password>` configures all of the above
 idempotently against a running slapd (auto-detects the database holding your