The Node That Killed Its Own Host — cgroups, Sled, and a 2.3 GB Miner on 8 GB of RAM

Part two of the DarkFi Pi: the node grew to 4.5 GB and was taking the host down with it. Notes on why the memory limits I wrote were ignored, why swap made it worse, how the OOM fight corrupted the database, and what a RandomX miner really costs.