fix(discv5): seed ENR seq from UNIX time#24817
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The local ENR was always rebuilt with the default seq of 1 on startup. Since the node key (and thus peer id) is persisted but the record is not, a node restarting with a new IP (e.g. a changed k8s POD_IP) but the same key never out-sequenced the record peers already hold, so they kept the stale address. Seeding seq from the current UNIX time makes it strictly increase across restarts without persisting the ENR. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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The local ENR was always rebuilt with the default seq of 1 on startup. Since the node key (and thus peer id) is persisted but the record is not, a node restarting with a new IP (e.g. a changed k8s POD_IP) but the same key never out-sequenced the record peers already hold, so they kept the stale address. Seeding seq from the current UNIX time makes it strictly increase across restarts without persisting the ENR.