fix(scanner): bound publication proof retries on main (#6870)

* fix(scanner): retain completed publication candidates

* fix(scanner): export publication activity helper

* test(ecstore): retain activity snapshot across retries

* fix(scanner): rebase publication proof retry onto main

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(scanner): resolve publication proof retry conflicts

Co-Authored-By: heihutu <heihutu@gmail.com>

---------

Co-authored-by: Henry Guo <marshawcoco@users.noreply.github.com>
Co-authored-by: heihutu <heihutu@gmail.com>

crates/ecstore/src/api/mod.rs

@@ -406,7 +406,7 @@ pub mod notification {
     pub use crate::services::notification_sys::{
         CrossPoolFenceFleetProofToken, NotificationPeerErr, NotificationSys, ScannerPublicationLeaseGrant,
         acquire_cross_pool_fence_fleet_proof, cross_pool_fence_fleet_proof_matches, get_global_notification_sys,
-        new_global_notification_sys, start_remote_version_state_fleet_probe,
+        new_global_notification_sys, scanner_peer_transport_error_message_is_retryable, start_remote_version_state_fleet_probe,
     };
 }
 

crates/ecstore/src/services/notification_sys.rs

@@ -1962,6 +1962,12 @@ where
         .map_err(|_| Error::other(format!("scanner activity peer {host} timed out after {timeout_duration:?}")))?
 }
 
+/// Classify transport-only activity failures without treating an answered
+/// peer's application error as an outage.
+pub fn scanner_peer_transport_error_message_is_retryable(error: &str) -> bool {
+    crate::cluster::rpc::client::message_has_network_needle(error)
+}
+
 fn scanner_activity_should_retry(first_error: Option<&Error>, timed_out: bool) -> bool {
     timed_out || first_error.is_some_and(PeerRestClient::is_network_like_error)
 }