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95f19b192f
Adding a node fails right after that node's panel restarts. nodes/add probes the node's /panel/api/server/status first, and that endpoint returns whatever the @2s ticker last sampled - nil until the first tick lands, so the master reads a healthy panel as unreachable and rejects it with "Add node (remote returned success=false: )", an error whose message is empty because the node answered success with a null obj. The window is far wider than one tick: GetStatus resolved the public IPv4/IPv6 addresses inline and held s.mu across every lookup, so a box with no IPv6 route spent 3s per service - about 15s of nil status after each restart, and the same stall on a fresh panel's first sample. - status now answers from CurrentStatus, which samples on demand when the ticker has not run yet instead of returning a null obj - the public-IP lookups run in the background and outside s.mu, so a status sample never waits on them - probe tells "no status yet" apart from a genuine success=false, so the master's error says something when it meets an older node