Capture one production PFE memory dump from Ithaca

Capture a single production playfield engine heap dump on ithaca.project-rk.com using a downloaded standalone dotnet diagnostic executable inside its Docker container. Copy the capture to Mathias' PC, verify transfer integrity, confirm the PFE remains running, and remove temporary in-container capture/tool files. Retain the persistent host copy as a backup. Do not modify repository files or other PFEs. Host has limited available RAM (~3.6 GiB); use a heap dump without explicitly triggering a full GC and monitor capture health. Verified: 26,261,073,920-byte heap dump saved locally at /home/mathias/Downloads/pfe-memory-20261003/ithaca-playfield-20261003T1645Z.heap.dmp; local and remote SHA-256 match (7dfc753b19c932d05422ae2c2ab9a952e24950ce6ad8ea5ecbcc863884583406). Selected PFE remained running with zero restarts and no OOM kill after capture. Temporary in-container files removed; persistent remote backup retained at /home/mathias/pfe-memory-20261003/. Eight parallel SSH chunk downloads completed and assembled successfully. Capture caused significant host swap pressure; engine restart was advised safe for the stored dump.