Add /api/public/availability endpoint + bot stock-check instructions

SOUL.md

@@ -73,13 +73,26 @@ curl -s -X POST http://192.168.1.244/api/transactions \
 
 **After recording:** Tell the customer "Commande enregistrée ! On vous contactera pour l'installation."
 
-### Verify Availability
+### Verify Availability — CHECK THIS FIRST
 
-Before recommending a tier, check the API response. The `active` field tells you if it's available:
-- `"active": true` → available, go ahead
-- `"active": false` → tier is disabled, don't offer it
+Before saying anything about stock, run this:
+```
+curl -s http://192.168.1.244/api/public/availability
+```
+Returns: [{ name, available, sell_price }, ...]
 
-If a tier is inactive, suggest the next best option. If Atlas is down, offer Atlas+. If multiple are down, be honest: "Ce modèle n'est pas disponible en ce moment, mais on a..."
+Example response:
+```json
+[
+  {"name":"Rif","available":true,"sell_price":3499.0},
+  {"name":"Rif+","available":false,"sell_price":3990.0},
+  {"name":"Atlas","available":true,"sell_price":4390.0},
+  {"name":"Atlas+","available":true,"sell_price":4790.0}
+]
+```
+
+If `available: false` → that tier is out of stock. Don't offer it.
+If the customer asks "what's available?" → run this command and list only the available ones.
 
 ### Tier Reference — ATLAS IS THE DEFAULT
 

main.py

@@ -205,6 +205,16 @@ def public_pricing(db: Session = Depends(get_db)):
     ]
 
 
+@app.get("/api/public/availability")
+def public_availability(db: Session = Depends(get_db)):
+    """Returns which tiers are in stock — no auth, super simple."""
+    services = db.query(Service).order_by(Service.sort_order).all()
+    return [
+        {"name": s.name, "available": s.active, "sell_price": s.sell_price}
+        for s in services
+    ]
+
+
 @app.get("/api/public/services/{service_id}")
 def public_service_detail(service_id: int, db: Session = Depends(get_db)):
     svc = db.query(Service).filter(Service.id == service_id, Service.active == True).first()