v0.8.47

Result

• Timestep convergence v1: converged (SF2, #148). All ten battery responses converge at the
  default 0.1 ms against 0.025 ms: same holds verdicts, seed-median rates within the finest
  seed range (giant fiber → TTMn exactly at it). First-spike latencies and recruitment of weak
  pathways move with the step (TTMn under giant fiber output 35 → 82 ms, sugar-recruited
  neurons 439 → 155) and do not decide. Run from the lock commit 7c4d34d in one attempt.

Also in this release

• Validation: T4/T5 v4 locked (dark-anchored medulla, lamina → medulla gain scan, Behnia et al. 2014's delays; run in progress); timestep convergence lock.
• Engineering: faster per-neuron membranes, bit-identical.
• Viewer: graded potentials in the 3D replay and the eye-on scene; an optional, experimental WebXR observer (?xr=1, unqualified on any headset).
• Docs: replication package (SF5) with the claims audit; the sensorimotor environment plan; provenance and docs aligned.

Full note: https://github.com/gianlucamazza/flymsg/blob/v0.8.47/CHANGELOG.md