README: add testing section, mark persistence done in roadmap

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -124,15 +124,32 @@ Replaces WASTE's original Blowfish/PCBC (broken cipher mode) + RSA.
 > Peer IDs are 64-char lowercase hex (Ed25519 public key). Existing `identity.json` files
 > on disk are unaffected — only the over-the-wire representation changed from base64url.
 
+## Testing
+
+A self-contained test script boots anchor + three peers, joins them to a named network, exchanges group messages and DMs, and verifies SQLite persistence:
+
+```bash
+./test-network.sh
+```
+
+Data lands at `/tmp/waste-test` (wiped on each run). Inspect after a run:
+
+```bash
+sqlite3 /tmp/waste-test/alice/messages.db
+.headers on
+SELECT room, from_peer, body, sent_at FROM messages;
+SELECT peer_id, alias, last_seen FROM peers;
+```
+
 ## Roadmap
 
 - [x] **Crypto layer** — hex peer IDs, `nacl/box` signaling, Ed25519→X25519 key derivation
-- [x] **Proto additions** — `mid` field, signaling types, anchor wire types, `hello` message, `FileDone`
-- [x] **Anchor server** (`cmd/anchor`) — WebSocket signaling server (replaces TCP relay)
-- [x] **WebRTC peer connections** — pion/webrtc DataChannels replace raw TCP in `internal/mesh`
-- [x] **Anchor client** (`internal/anchor`) — ICE offer/answer/candidate lifecycle, `nacl/box` sealing
-- [x] **IPC updates** — `join_network`/`leave_network` replace `connect`; `session_ready` event added
+- [x] **Proto additions** — `mid` dedup field, signaling types, anchor wire types, `hello` message
+- [x] **Anchor server** (`cmd/anchor`) — WebSocket signaling server replacing TCP relay
+- [x] **WebRTC peer connections** — pion/webrtc DataChannels; ICE hole-punching via STUN
+- [x] **Anchor client** (`internal/anchor`) — offer/answer/candidate lifecycle, `nacl/box` sealing
+- [x] **IPC updates** — `join_network`/`leave_network`; `session_ready` event; DMs via `to` field
+- [x] **Message persistence** — SQLite (`internal/store`); messages and peer alias cache
+- [ ] **TUI** — Bubble Tea terminal UI consuming the IPC port
 - [ ] **File transfer** — chunked binary DataChannel (`f:<xid>`)
-- [ ] **Message persistence** — SQLite via `modernc.org/sqlite`
-- [ ] **TUI** — Bubble Tea client consuming the IPC port
 - [ ] **Native UI** — web frontend with native packaging (Tauri-style)