docs(org): complete A5 living-docs sweep (item CRUD merged) + dead_code cleanup

Extends the A5 pre-stage now that dev-b's full B-stream (item CRUD + all 19
org subcommands) merged to main (7392795). Living docs:
- FORMATS/CRYPTO/SECURITY/DESIGN: flip the item-CRUD "pending Dev-B" markers to
  shipped; SECURITY audit vocabulary moves item-* actions to live.
- crates/relicario-cli/ARCHITECTURE.md: full 19-subcommand surface (12 admin +
  7 item CRUD), accurate OrgAddKind scope (Login/SecureNote/Identity).
- STATUS.md: enterprise-org-vault landed section (merged 7392795) + tracked
  follow-ups + honest known-limitations; correct spec citation.
- ROADMAP.md: backend-complete row + phase-2 follow-ups.
- CHANGELOG.md: finalize the enterprise-org-vault Unreleased section (item CRUD
  into Added; Card/Key/Document/Totp + extension + phase-2 into Deferred).

Code (PM-directed dead_code fixes): wire device::current_device_seed by removing
the identical duplicate private fn in org_session.rs (de-dup); #[allow(dead_code)]
+ justification on org_session org_meta_path/load_meta (API completeness, no
command consumes org.json yet). Also silence a 3rd pre-existing test-only warning
(unused relicario() helper in tests/org_init_signing.rs).

Honest deferrals kept explicit throughout: Card/Key/Document/Totp org add/edit
parity, extension org switch/read (Dev-D) + writes, phase-2 (SSO/LDAP, read
audit, per-collection subkeys, HTTP plane). Full workspace cargo test green,
zero warnings. All cited code constants pinned file:line.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TJo44YM3UbBjro2fG6NrKy

crates/relicario-cli/ARCHITECTURE.md

@@ -74,26 +74,43 @@ under `src/commands/`. Each source file has one job.
 - **`src/org_session.rs`** — `UnlockedOrgVault`, the org-vault analogue of
   `session.rs`. Holds the org master key in `Zeroizing<[u8; 32]>` for one CLI
   invocation, recovered by unwrapping `keys/<member-id>.enc` with the device
-  ed25519 seed (`relicario_core::unwrap_org_key`). Owns the **collection-scoped**
-  `item_path` (`items/<collection-slug>/<id>.enc` — the leading slug is what the
-  pre-receive hook authorizes against, never decrypting), fingerprint-based
-  member matching (`relicario_core::fingerprint`, tolerant of OpenSSH
-  whitespace/comment differences), `atomic_write`, and `org_git_run`. Note
-  `org_git_run` runs **bare git** — unlike `helpers::git_run` it does NOT inject
+  ed25519 seed. `open_org_vault` calls `crate::device::current_device_seed()`
+  directly (`device.rs`) — a duplicate private fn that previously existed in
+  `org_session.rs` was removed during the A5 sweep (implementations were
+  identical). Owns the **collection-scoped** `item_path`
+  (`items/<collection-slug>/<id>.enc` — the leading slug is what the pre-receive
+  hook authorizes against, never decrypting), fingerprint-based member matching
+  (`relicario_core::fingerprint`, tolerant of OpenSSH whitespace/comment
+  differences), `atomic_write`, and `org_git_run`. Note `org_git_run` runs
+  **bare git** — unlike `helpers::git_run` it does NOT inject
   `commit.gpgsign=false`, because org commits MUST be signed (the hook verifies
   every commit's signature); signing config is established by
   `configure_git_signing` during `org init`.
 
-- **`src/commands/org.rs`** — the `relicario org` subcommand surface. Merged:
-  `init`, `add-member` / `remove-member` / `set-role` (owner-only escalation
-  guard), `create-collection` / `grant` / `revoke`, `rotate-key`
-  (`run_rotate_key`, `commands/org.rs:332` — fresh key, re-wrap for all members,
-  re-encrypt every item blob + manifest under the new key, concurrent-rotation
-  abort), and `status` / `audit` (verified-signer attribution + `TAMPERED`
-  flag). **TODO (pending Dev-B B9–B14):** the item-CRUD commands (`org add` /
-  `get` / `list` / `edit` / `rm` / `restore` / `purge`) and the final
-  `Commands::Org` wiring in `main.rs`. `device.rs` gains
-  `current_device_seed` / `current_device_pubkey` helpers for the ECIES unwrap.
+- **`src/commands/org.rs`** — the `relicario org` subcommand surface. Full
+  19-subcommand surface is merged and wired via `Commands::Org` in `main.rs`.
+
+  *Admin / lifecycle (12):* `init` (structure + wrap + `configure_git_signing` +
+  signed bootstrap commit), `add-member` / `remove-member` / `set-role`
+  (owner-only escalation guard), `create-collection` / `grant` / `revoke`,
+  `rotate-key` (`run_rotate_key`, `commands/org.rs:332` — fresh key, re-wrap for
+  all members, re-encrypt every item blob + manifest under the new key,
+  concurrent-rotation abort), `transfer-ownership`, `delete-org`, `status` /
+  `audit` (verified-signer attribution + `TAMPERED` flag).
+
+  *Item CRUD (7):* `org add` creates typed items via `OrgAddKind`
+  (`commands/org.rs:749`) — **Login / SecureNote / Identity only**; Card /
+  SshKey / Document / Totp creation is a deferred follow-up. `get` / `list` can
+  display any item type if present. `org get <query> [--show]` masks secrets
+  unless `--show`; `org list [--trashed]` filters by the caller's collection
+  grants; `org edit <query>` is flag-driven (blank flags keep current values);
+  `org rm` soft-deletes, `org restore` undoes, `org purge` permanently removes
+  the encrypted blob. All item ops are collection-scoped and grant-enforced. The
+  audit trail emits `item-create` / `item-update` / `item-delete` /
+  `item-restore` / `item-purge`.
+
+  Deferred: Card / SshKey / Document / Totp `org add` / `edit` parity;
+  extension org reads and writes (Dev-D).
 
 - **`src/helpers.rs`** (`helpers.rs:1-101`) — pure, no-state plumbing:
   `find_vault_dir_from` (`helpers.rs:14-28`) walks up parent directories