Update EKÁER config, thresholds, and value logic

- Switched DB connection to FruitBank_PROD in appsettings.json
- Added Ekaer config section: company info, thresholds, exchange rate
- Refactored CreateMissingEkaerHistories to use new settings, load related data, and apply exemption/threshold logic
- Updated controller DI to use EkaerSettings
- Centralized EKÁER config binding in PluginNopStartup
- Documented currency source issue and new value/category logic in EKAER_ISSUES.md and EKAER_TODO.md

Presentation/Nop.Web/App_Data/appsettings.json

@@ -1,6 +1,6 @@
 {
   "ConnectionStrings": {
-    "ConnectionString": "Data Source=100.73.220.50;Initial Catalog=FruitBank_DEV;Integrated Security=False;Persist Security Info=False;User ID=sa;Password=v6f_?xNfg9N1;Trust Server Certificate=True",
+    "ConnectionString": "Data Source=100.73.220.50;Initial Catalog=FruitBank_PROD;Integrated Security=False;Persist Security Info=False;User ID=sa;Password=v6f_?xNfg9N1;Trust Server Certificate=True",
     "DataProvider": "sqlserver",
     "SQLCommandTimeout": null,
     "WithNoLock": false

Presentation/Nop.Web/appsettings.json

@@ -30,5 +30,25 @@
 				//}
 			]
 		}
+	},
+
+	"Ekaer": {
+		"Company": {
+			"Name": "FruitBank Kft.",
+			"TaxId": "14902170-2-13",
+			"CountryCode": "HU",
+			"PostalCode": "1068",
+			"City": "Budapest",
+			"Street": "Rippl-Rónai u. 18.",
+			"Phone": "301111111",
+			"Email": "info@fruitbank.hu"
+		},
+		"Thresholds": {
+			"WeightKg": 200,
+			"ValueHuf": 250000
+		},
+		"ExchangeRate": {
+			"EurHuf": 356
+		}
 	}
 }