Sprint 1 : scaffolding complet de Glibredecision

Plateforme de decisions collectives pour Duniter/G1.
Backend FastAPI async + PostgreSQL (14 tables, 8 routers, 6 services,
moteur de vote avec formule d'inertie WoT/Smith/TechComm).
Frontend Nuxt 4 + Nuxt UI v3 + Pinia (9 pages, 5 stores).
Infrastructure Docker + Woodpecker CI + Traefik.
Documentation technique et utilisateur (15 fichiers).
Seed : Licence G1, Engagement Forgeron v2.0.0, 4 protocoles de vote.
30 tests unitaires (formules, mode params, vote nuance) -- tous verts.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/engine/smith_threshold.py

@@ -0,0 +1,31 @@
+"""Smith sub-WoT threshold criterion.
+
+The Smith criterion requires a minimum number of votes from Smith members
+(forgerons) for certain decisions to be valid.
+
+Formula: ceil(SmithWotSize ^ S)
+"""
+
+from __future__ import annotations
+
+import math
+
+
+def smith_threshold(smith_wot_size: int, exponent: float = 0.1) -> int:
+    """Compute the minimum number of Smith member votes required.
+
+    Parameters
+    ----------
+    smith_wot_size:
+        Number of active Smith members.
+    exponent:
+        S in the formula ``ceil(smith_wot_size^S)``.
+
+    Returns
+    -------
+    int
+        Minimum Smith votes required.
+    """
+    if smith_wot_size <= 0:
+        raise ValueError("smith_wot_size doit etre strictement positif")
+    return math.ceil(smith_wot_size ** exponent)