docs: 更正012注册和006绑定协议

docs/architecture/03-binding-flow.md

@@ -6,11 +6,12 @@ The mini-program binding flow validates an active `device_auth` row before it
 creates a pending bind session. Final binding is completed after the device
 returns an NFC card UUID.
 
-This is the user/NFC binding flow and is separate from the device-level
-`msg_id=012` bootstrap/binding handshake documented in
-`02-device-bootstrap.md`. The `msg_id=012` success receipt assigns the device
-identity and returns `iccid`; this flow binds that device to a mini-program
-user and optional child through the NFC card exchange.
+This is the `msg_id=006` device-binding flow and is separate from the device
+registration handshake documented in `02-device-bootstrap.md`. `msg_id=012`
+only registers the device identity. `msg_id=006` starts and completes binding
+the device to a mini-program user and optional child through the NFC card
+exchange; its successful receipt carries the ICCID needed by the downstream
+SIM/traffic service.
 
 ```mermaid
 sequenceDiagram
@@ -42,7 +43,7 @@ sequenceDiagram
     API-->>Mini: bind_token, expires_at
   end
 
-  Device->>MQTT: NFC response / card UUID
+  Device->>MQTT: msg_id=006 binding success / card UUID / ICCID
   MQTT->>Binding: finalize_nfc_bind(device_id, card_uuid)
   Binding->>DAO: load latest pending bind session
   Binding->>Card: activate_card(card_uuid, device_id)
@@ -51,6 +52,27 @@ sequenceDiagram
   Binding->>DAO: mark session completed
 ```
 
+## Binding Success Receipt
+
+The successful device-binding receipt uses `msg_id=006` and includes the
+authoritative ICCID:
+
+```json
+{
+  "msg_id": "006",
+  "params": {
+    "device_id": "TalkingQ_ZHWK00002110",
+    "device_sn": "TQ_ZHWK000000002110",
+    "iccid": "898604E91123D1334901"
+  }
+}
+```
+
+The ICCID must come from the authoritative IMEI-to-ICCID provisioning record
+or a validated device report. It must not be derived from the IMEI. If the
+binding response cannot provide a valid ICCID, the binding result must not be
+reported as a complete success.
+
 ## Related Tables
 
 ```mermaid