Changes for release node/v0.5.2

[bvscd]

No description provided.

[Copilot]

Pull request overview

Enables fast sync overlays to use two-step broadcast with QUIC reliability, and refactors semi-private overlays to distinguish validator ADNL IDs from validator signing public keys (for certificate verification).

Changes:

• Extend semi-private overlay creation to accept both root_adnl_ids and root_public_keys, plus a use_quic flag.
• Update fast sync overlay routing to include prev/this/next validator sets as roots and optionally send via two-step broadcast.
• Add client helpers to send two-step broadcasts and plumb QUIC enablement through overlay types.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/node/src/network/overlay_client.rs	Updates semi-private overlay creation parameters and adds broadcast_twostep wrapper.
src/node/src/network/full_node_overlays.rs	Passes QUIC settings + expanded root validator set into fast sync overlays; conditionally uses two-step broadcast.
src/node/src/network/fast_sync_overlay_client.rs	Builds root ADNL/public key lists, toggles two-step/QUIC usage, and adds send_twostep_broadcast.
src/adnl/tests/test_overlay.rs	Adjusts semi-private overlay tests to new add_semiprivate_overlay signature.
src/adnl/src/overlay/mod.rs	Refactors certified-member overlay state, adds QUIC support for it, and filters two-step neighbours to root validators.

Comments suppressed due to low confidence (1)

src/node/src/network/full_node_overlays.rs:476

• update_fast_sync_overlays now takes mc_use_quic / shard_use_quic, but the early-return condition only checks monitor_min_split and validators_changed. If QUIC config changes while those stay the same, overlays won't be recreated and the new setting won’t take effect. Consider tracking the previous QUIC settings (e.g., store them alongside monitor_min_split_for_fast_sync) and include them in the change detection logic.

        let mut cur_validators = self.validators.lock().await;
        let validators_changed = *cur_validators != *this_validators;
        let old_monitor_min_split = self.monitor_min_split_for_fast_sync.load(Ordering::Relaxed);
        if (old_monitor_min_split == new_monitor_min_split) && !validators_changed {
            return Ok(());
        }

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