feat(discovery): report libp2p connections so discv5 paces its lookups

CLAUDE.md

@@ -282,9 +282,11 @@ actual_slot = finalized_slot + 1 + relative_index
 
 ### Peer Discovery (discv5, opt-in)
 - Off by default; `--discovery.enable` plus `--discovery.port` (own UDP socket, must differ from `--gossipsub-port`)
-- Reuses ethrex's `DiscoveryServer` + `PeerTable` with discv4 disabled; `spawn` takes the prepared lean ENR, so the record ethrex serves is the one we report
+- Reuses ethrex's `DiscoveryServer` with discv4 disabled; `spawn` takes the prepared lean ENR, so the record ethrex serves is the one we report
 - ENR follows the beacon phase0 spec: `ip`/`udp`/`quic`/`secp256k1`/`eth2`/`attnets`
-- Admission mirrors lighthouse: `eth2.fork_digest` must match, `next_fork_*` may differ, `quic` entry required. Handed to the peer table as `LeanFilter: PeerFilter`, so records are judged on arrival, not at dial time; a reject is re-judged on a higher-`seq` ENR
+- Admission mirrors lighthouse: `eth2.fork_digest` must match, `next_fork_*` may differ, `quic` entry required. Handed to discovery as `LeanFilter: PeerFilter`, so records are judged on arrival, not at dial time; a reject is re-judged on a higher-`seq` ENR
+- The filter files each admitted peer in `DialTargets`, since discovery hands back a `Node` that carries no `quic`/`attnets`; the dial loop looks the node id back up there
+- Every libp2p connection is reported with `DiscoveryHandle::record_peer_event`, which is what lets discovery pace its lookups against `--discovery.target-peers`
 - Candidates ranked by uncovered attestation subnets. See [`docs/discovery.md`](docs/discovery.md)
 
 ### Retry Strategy on Block Requests

crates/net/p2p/Cargo.toml

@@ -35,13 +35,17 @@ rand = "0.8"
 
 # Required for NodeEnr parsing.
 #
-# Pinned to an ethrex release tag, for the unified discovery module, the peer
-# table, and the `PeerFilter` seam this crate builds on. A tag rather than a
-# branch: a `main` that moves under us would change what this crate builds
-# against with nothing in the manifest saying so.
-ethrex-p2p = { git = "https://github.com/lambdaclass/ethrex", tag = "v25.0.0" }
-ethrex-rlp = { git = "https://github.com/lambdaclass/ethrex", tag = "v25.0.0" }
-ethrex-common = { git = "https://github.com/lambdaclass/ethrex", tag = "v25.0.0" }
+# Pinned to the head of ethrex PR #7217, which moves the contact table into the
+# discovery server and gives a consumer `DiscoveryHandle::record_peer_event` to
+# report its own connections with. That is what lets a libp2p client feed
+# ethrex's lookup pacing; see `docs/discovery.md`.
+#
+# A commit rather than a branch, for the reason the release tag it replaces was
+# chosen over `main`: what this crate builds against must not move without the
+# manifest saying so. Goes back to a tag once #7217 is in a release.
+ethrex-p2p = { git = "https://github.com/lambdaclass/ethrex", rev = "4462253ea2785b20d8ee8822034f2a98b49ae839" }
+ethrex-rlp = { git = "https://github.com/lambdaclass/ethrex", rev = "4462253ea2785b20d8ee8822034f2a98b49ae839" }
+ethrex-common = { git = "https://github.com/lambdaclass/ethrex", rev = "4462253ea2785b20d8ee8822034f2a98b49ae839" }
 
 # Version pinned to ethrex's workspace: `SecretKey` crosses the API boundary.
 secp256k1 = { version = "0.30.0", default-features = false, features = ["global-context"] }