Refresh libp2p relay reservations before registration renewals

[robinbraemer]

Summary

• refresh endpoint relay reservations before opening a libp2p registration stream and publishing its registration record
• reuse the reserved relay address set for registration renewals on that stream, avoiding repeated relay reservation/listen calls during renewals
• close/retry the registration stream if reservation refresh fails instead of renewing stale relay addrs
• add connector-side close/error logs around libp2p tunnel and local backend channel shutdown paths
• preserve the public no-arg Libp2pTunnelTransport() constructor while allowing Guice logger injection

Evidence

• Staging Bedrock failure at 2026-06-23T07:56:23Z showed libp2p dial failure: relay circuit returned NO_RESERVATION (204), then legacy fallback returned no_responders.
• Local patched Paper jar loaded on codexstage22a at 2026-06-23T08:06:19Z.
• Bedrock retry at 2026-06-23T08:10:52Z accepted via libp2p: selectedTransport=direct, warmPath=warm.
• Join completed at 2026-06-23T08:10:54Z with connectionStatus=success; Paper logged RoboFlax2 joined the game.
• Five-minute bounded watch after join produced no new NO_RESERVATION or disconnect logs.
• Later Bedrock hold after diagnostic restart at 2026-06-23T08:40:43Z accepted via libp2p with session d8t4d2ri940s201odsb0, selectedTransport=direct, warmPath=warm, connectionStatus=success; Paper still listed RoboFlax2 online at 10:57:50 Europe/Berlin, then the session ended at 2026-06-23T08:59:43Z with Geyser Bedrock client timed out. No NO_RESERVATION or no_responders appeared, so the remaining long-hold failure does not match stale relay reservation.

Tests

• ./gradlew core:test --tests 'com.minekube.connect.tunnel.p2p.*'
• ./gradlew :core:test --tests 'com.minekube.connect.tunnel.p2p.*'
• ./gradlew test
• ./gradlew cleanTest test check
• git diff --check