Update README: LOT API origins array, updated DB schema

Reflects nested batch_origin_entries structure, farmers table,
decimal(6,2) precision fix for recipes_spices.

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

README.md

@@ -133,12 +133,20 @@ GET https://api.sms.spices.blue/api/v1/{lot_number}
       {
         "name": "Kurkuma",
         "percentage": 60.0,
-        "origin": {
+        "origins": [
+          {
             "country": "Indien",
-          "farmer": "Singh Farm",
             "supplier": "Gewürzhandel GmbH",
+            "farmer": "Singh Farm",
             "notes": null
+          },
+          {
+            "country": "Sri Lanka",
+            "supplier": "Ceylon Spices",
+            "farmer": null,
+            "notes": "Restmenge aus Vorlieferung"
           }
+        ]
       }
     ]
   }
@@ -200,7 +208,7 @@ Table recipes {
 Table recipes_spices {
     recipe_id int [ref: > recipes.id]
     spice_id int [ref: > spices.id]
-    amount_in_percent decimal(4,2)
+    amount_in_percent decimal(6,2)
 }
 
 Table packings {
@@ -250,11 +258,21 @@ Table batch_origins {
     id int [pk]
     batch_id int [ref: > batches.id]
     spice_id int [ref: > spices.id]
+}
+
+Table batch_origin_entries {
+    id int [pk]
+    batch_origin_id int [ref: > batch_origins.id]
     supplier_id int [ref: > suppliers.id, nullable]
     origin_country varchar
-    farmer varchar
+    farmer_id int [ref: > farmers.id, nullable]
     notes text
 }
+
+Table farmers {
+    id int [pk]
+    name varchar(255)
+}
 ```
 
 ---
@@ -267,7 +285,7 @@ Table batch_origins {
 - [x] Rezepte mit Versionierung
 - [x] Produktgrößen, Preise, SKU, GTIN mit Barcode-Vorschau
 - [x] Inventar (eindeutige Items mit Ausgangs-Flag)
-- [x] Chargen (LOT) mit automatischem Rohstoff-Abzug
+- [x] Chargen (LOT) mit automatischem Rohstoff-Abzug und mehreren Lieferanten/Landwirten pro Rohstoff
 - [x] Warenausgang (Produktverkauf)
 - [x] Shopify-Import (Produkte, Varianten, Lagerbestand, Bilder, Beschreibung, Preise)
 - [x] Continuous Deployment via Gitea Actions + Docker