Remove outdated edge gateway object classes, add new agent implementation

Transitioned from obsolete gateway object classes (`edge_gateway_shell_action_jobs_o`, `edge_gateway_shell_events_o`, `edge_gateway_shell_sessions_o`, `edge_gateway_update_jobs_o`) to the new agent implementation (`edge-gateway-agent/agent.php`).

services/nginx/app/classes/economic.php

@@ -29,6 +29,8 @@ use interfaces\economic_i;
 
 class economic implements economic_i
 {
+    public const DRAFT_CUSTOMER_EXPORT_BLOCKED_MESSAGE = 'Transactions for the configured draft customer cannot be exported to e-conomic.';
+
     /**
      * Configuration of the economic module
      * @var economic_c
@@ -120,6 +122,37 @@ class economic implements economic_i
         return new $this->helpers->economic_tasks();
     }
 
+    public function getTransactionDraftCustomerNumber(): ?int
+    {
+        $value = $this->config->transaction_draft_customer_number->getVariableValue();
+        if ($value === null || $value === '') {
+            return null;
+        }
+
+        $customer_number = (int)$value;
+        return $customer_number > 0 ? $customer_number : null;
+    }
+
+    public function isDraftCustomerNumber(?int $customer_number): bool
+    {
+        $configured_customer_number = $this->getTransactionDraftCustomerNumber();
+        if ($configured_customer_number === null || $customer_number === null) {
+            return false;
+        }
+
+        return $configured_customer_number === (int)$customer_number;
+    }
+
+    /**
+     * @throws \Exception
+     */
+    public function assertCustomerNumberIsNotDraft(?int $customer_number): void
+    {
+        if ($this->isDraftCustomerNumber($customer_number)) {
+            throw new \Exception(self::DRAFT_CUSTOMER_EXPORT_BLOCKED_MESSAGE);
+        }
+    }
+
     /**
      * Create a customer in e-conomic and return the raw upstream payload.
      */