fix: detach block callbacks from substrate subscription handler - #428
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Block callbacks were awaited inside the subscription handler, so any callback running longer than 120s stalled header processing, tripped the staleness watchdog, and was cancelled mid-flight. The generator challenge sweep exceeds 120s, so challenges were never issued. - Run block callbacks as detached tasks so header processing never stalls - Bound the miner-type sweep with a 10s socket connect timeout - Disable the startup weight set
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Block callbacks were awaited inside the subscription handler, so any callback running longer than 120s stalled header processing, tripped the staleness watchdog, and was cancelled mid-flight. The generator challenge sweep exceeds 120s, so challenges were never issued.