Record the per-IP -> per-session correction: why source-IP-only was unsafe (two
FIFA processes share an IP), the authoritative per-login X-UT-SID key with IP and
persona as auxiliary, the Capability/StoreMode state machine, the single-use
short-TTL launcher->session pending hand-off, activity-based session cleanup, and
the documented fail-closed residual for genuinely simultaneous same-(ip,persona)
logins. Design history is retained; the per-IP prototype is marked superseded.
funman300
a82407c686