Wire KV sync through iroh-docs

crates/geth-control/src/lib.rs

@@ -1205,6 +1205,7 @@ pub enum PeerControlResponse {
         name: String,
         entries: Vec<KvSyncEntry>,
         high_water_ms: i64,
+        docs_ticket: Option<String>,
         allowed: bool,
         reason: String,
         evaluated_ops: usize,
@@ -2359,6 +2360,7 @@ mod tests {
                 updated_at_ms: 42,
             }],
             high_water_ms: 43,
+            docs_ticket: Some("doc-ticket".to_owned()),
             allowed: true,
             reason: "direct grant".to_owned(),
             evaluated_ops: 1,