anti bce2c1940c feat(1.1): supervise cpu group with ProcessPoolExecutor kernel offload ...

Hosts clusterer/campaign-clusterer/attribution/reuse-correlate in one
process. The two O(n^2) connected-components kernels (cluster_observations,
cluster_identities) offload to ONE shared forkserver pool via decnet.offload
.run_kernel, so they run in parallel instead of serialising under the GIL.

- offload.run_kernel: pool when installed + offload_if holds, else inline.
  Standalone workers and all tests run inline => behaviour unchanged
  (424 clustering/correlation tests green).
- offload_if gates on input size (>=256) to skip pickle cost on small passes.
- forkserver (not fork): supervisor is multithreaded via bus clients.
- attribution/reuse co-located but not offloaded yet (lighter; same run_kernel
  path extends to them if profiling shows contention).
- systemd unit Conflicts= the 4 units it replaces; no docker/raw-socket priv.

2026-06-17 17:35:42 -04:00

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