doc: add partid to sendonion schema.

We never called this except from plugins, which didn't test schema.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

doc/lightning-sendonion.7.md

@@ -98,6 +98,7 @@ On success, an object is returned, containing:
 - **label** (string, optional): the label, if given to sendpay
 - **bolt11** (string, optional): the bolt11 string (if supplied)
 - **bolt12** (string, optional): the bolt12 string (if supplied: **experimental-offers** only).
+- **partid** (u64, optional): the partid (if supplied) to sendonion/sendpay
 
 If **status** is "complete":
   - **payment_preimage** (hex): the proof of payment: SHA256 of this **payment_hash** (always 64 characters)
@@ -127,4 +128,4 @@ RESOURCES
 Main web site: <https://github.com/ElementsProject/lightning>
 
 [bolt04]: https://github.com/lightningnetwork/lightning-rfc/blob/master/04-onion-routing.md
-[comment]: # ( SHA256STAMP:d588d85b79f709a57441479504ee8761331c852284ebb8effeab91a557437517)
+[comment]: # ( SHA256STAMP:b8fd5d1c31eb2db10b2f32960752ae1c90150ffeb470c5ea635cb1034e8b1438)

doc/schemas/sendonion.schema.json

@@ -61,6 +61,10 @@
     "bolt12": {
       "type": "string",
       "description": "the bolt12 string (if supplied: **experimental-offers** only)."
+    },
+    "partid": {
+      "type": "u64",
+      "description": "the partid (if supplied) to sendonion/sendpay"
     }
   },
   "allOf": [
@@ -94,6 +98,7 @@
           "label": {},
           "bolt11": {},
           "bolt12": {},
+          "partid": {},
           "payment_preimage": {
             "type": "hex",
             "description": "the proof of payment: SHA256 of this **payment_hash**",
@@ -131,6 +136,7 @@
           "label": {},
           "bolt11": {},
           "bolt12": {},
+          "partid": {},
           "message": {
             "type": "string",
             "description": "Monitor status with listpays or waitsendpay"