docs: Dütsch protocol — mandatory periodic-regime gate ledger rows

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/validation/duetsch_re100_kc5_protocol.md

@@ -48,6 +48,23 @@ non-normative until the primary-spec packet and Astra's feasibility check land.
 - The G4 timing check (100 coarse vs 400 diffusive-fine steps) is a matched
   short transient, not evidence of periodic convergence.
 
+Mandatory ⟨gate⟩ ledger rows, same schema for every case (values ⟨verify⟩ /
+PROVISIONAL until the primary-spec packet and measurements exist):
+
+| field | content |
+|---|---|
+| dx, dt | lattice spacing and step in physical/nondimensional units |
+| U_max, nu, Re, KC | lattice and nondimensional values |
+| T | period in native steps and in nondimensional time |
+| duration | total native steps, nondimensional time, periods |
+| discard | discarded cycles / transient cutoff |
+| window | accepted window, declared as the SAME cycle indices (or the same nondimensional interval after discard) for the whole ladder |
+| cycle ledger | per cycle: mean, RMS, peak Fx (and Morison coefficients if scored); relative change k → k+1 below a predeclared tol for ≥ N consecutive cycles before the window (tol, N OPEN) |
+| verdict | PASS, or FAIL-CLOSED if a finer grid covers less physical time, the window differs, or the cycle ledger is missing or unconverged |
+
+No literature comparison, cross-resolution statement or VIV statistic is made
+for a case without a PASS ledger.
+
 ## 2. Resolution ladder (uniform only, fixed Mach)
 
 | D (cells) | U_max | nu_lat | tau | steps / period |