T2 (commit aa2854017) registered 4 SP7 ResetEntries:
sp7_lb_diff_var_cql → ISV[297..301)
sp7_lb_sample_var_cql → ISV[301..305)
sp7_lb_diff_var_c51 → ISV[305..309)
sp7_lb_sample_var_c51 → ISV[309..313)
But never added their dispatch arms in `reset_named_state`. At fold
boundary, the dispatcher panics with "unknown name 'sp7_lb_diff_var_cql'"
because every FoldReset entry must have a matching match arm.
Same shape as bug #281 (SP5 Layer A bug-fix). Surfaced by the SP7 T7
local sanity smoke (test_magnitude_distribution).
The 4 new arms mirror the existing `sp5_budget_cql` / `sp5_budget_c51`
template — `for b in 0..4 { write_isv_signal_at(BASE + b, 0.0); }`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>