Migration from standalone SSE

The standalone SSE implementation is represented by the qslib-sse crate and the qslib facade’s sse feature. Canonical BasisBit, weighted interactions, logical chain seeds, operator-string trace closure, and thermodynamic moments are owned by qslib types.

Migration should proceed in this order:

1. Resolve the model using qslib’s canonical row-major sites and explicit per-pair coefficients.
2. Select the sign-safe LocalSseModel decomposition and verify the supported interaction channels.
3. Preserve logical chain identifiers and the versioned seed derivation when changing worker counts.
4. Compare tiny thermal energies against exact enumeration before scaling the system or changing sweep controls.
5. Store resolved inputs, controls, checksums, and uncertainty metadata in the versioned IO artifacts.

Legacy spin labels and x-major site order require named adapters. They must not be inferred from an array shape or silently accepted as canonical qslib input.