Move docs/product/ssp.md to docs/archive/ssp-v1.md. The original
thin intent doc is superseded by ssp-refined.md which adds the full
conversational activation spec, two-phase relationship model, and
integration with UC-04/UC-05 use cases.
Update product README to reference ssp-refined.md as the operating spec.
Archive README updated to catalog the archived file.
Decision: original preserved for historical traceability; do not use
as implementation reference.
Co-authored-by: Ty <tybala@outlook.com>
Signed-off-by: Ty <tybala@outlook.com>
