schema: Fix wrong type of CLTV in route

We were using `number` instead of `u32` which caused it to be
serialized to string with a decimal, which then would be rejected by
lightningd.

Changelog-Fixed: proto: Fixed a wrong number type being used in routes

.gitattributes

@@ -17,4 +17,4 @@ statements_gettextgen.po linguist-generated=true
 cln-grpc/proto/node.proto -text -diff linguist-generated=true
 cln-grpc/src/convert.rs -text -diff linguist-generated=true
 cln-rpc/src/model.rs -text -diff linguist-generated=true
-contrib/pyln-testing/pyln/testing/node_pb2.py linguist-generated=true
+contrib/pyln-testing/pyln/testing/node_pb2.py -text -diff linguist-generated=true

cln-grpc/proto/node.proto

@@ -1533,7 +1533,7 @@ message GetrouteRequest {
 	bytes id = 1;
 	Amount amount_msat = 9;
 	uint64 riskfactor = 3;
-	optional double cltv = 4;
+	optional uint32 cltv = 4;
 	optional bytes fromid = 5;
 	optional uint32 fuzzpercent = 6;
 	repeated string exclude = 7;

cln-grpc/src/convert.rs

@@ -2204,7 +2204,7 @@ impl From<requests::GetrouteRequest> for pb::GetrouteRequest {
             id: c.id.serialize().to_vec(), // Rule #2 for type pubkey
             amount_msat: Some(c.amount_msat.into()), // Rule #2 for type msat
             riskfactor: c.riskfactor, // Rule #2 for type u64
-            cltv: c.cltv, // Rule #2 for type number?
+            cltv: c.cltv, // Rule #2 for type u32?
             fromid: c.fromid.map(|v| v.serialize().to_vec()), // Rule #2 for type pubkey?
             fuzzpercent: c.fuzzpercent, // Rule #2 for type u32?
             // Field: GetRoute.exclude[]
@@ -2892,7 +2892,7 @@ impl From<pb::GetrouteRequest> for requests::GetrouteRequest {
             id: PublicKey::from_slice(&c.id).unwrap(), // Rule #1 for type pubkey
             amount_msat: c.amount_msat.unwrap().into(), // Rule #1 for type msat
             riskfactor: c.riskfactor, // Rule #1 for type u64
-            cltv: c.cltv, // Rule #1 for type number?
+            cltv: c.cltv, // Rule #1 for type u32?
             fromid: c.fromid.map(|v| PublicKey::from_slice(&v).unwrap()), // Rule #1 for type pubkey?
             fuzzpercent: c.fuzzpercent, // Rule #1 for type u32?
             exclude: Some(c.exclude.into_iter().map(|s| s.into()).collect()), // Rule #4

cln-rpc/src/model.rs

@@ -1270,7 +1270,7 @@ pub mod requests {
 	    pub amount_msat: Amount,
 	    pub riskfactor: u64,
 	    #[serde(skip_serializing_if = "Option::is_none")]
-	    pub cltv: Option<f64>,
+	    pub cltv: Option<u32>,
 	    #[serde(skip_serializing_if = "Option::is_none")]
 	    pub fromid: Option<PublicKey>,
 	    #[serde(skip_serializing_if = "Option::is_none")]

doc/schemas/getroute.request.json

@@ -20,7 +20,7 @@
       "description": ""
     },
     "cltv": {
-      "type": "number",
+      "type": "u32",
       "description": ""
     },
     "fromid": {