Add knowledge file for raising events inside try functions (#31)

community/knowledge/events/avoid-raising-events-inside-try-functions.good.al

@@ -0,0 +1,38 @@
+// Demonstration only. Shows the correct pattern: raise the integration event before entering TryFunction.
+
+codeunit 50114 "Payment Processor"
+{
+    [IntegrationEvent(false, false)]
+    procedure OnBeforeSubmitPayment(var PaymentAmount: Decimal; var Cancel: Boolean)
+    begin
+    end;
+
+    procedure SubmitPayment(PaymentAmount: Decimal)
+    var
+        Cancel: Boolean;
+        Success: Boolean;
+    begin
+        Cancel := false;
+        // Event raised outside the try scope - subscriber errors propagate normally to the caller.
+        OnBeforeSubmitPayment(PaymentAmount, Cancel);
+        if Cancel then
+            exit;
+
+        // Only the operation that can fail transiently lives inside TryFunction.
+        Success := TryCallPaymentGateway(PaymentAmount);
+        if not Success then
+            Error('Payment gateway call failed. Check connectivity and retry.');
+    end;
+
+    [TryFunction]
+    local procedure TryCallPaymentGateway(PaymentAmount: Decimal)
+    var
+        Client: HttpClient;
+        Response: HttpResponseMessage;
+    begin
+        // ... build request, set headers ...
+        Client.Get('https://payments.example.com/submit?amount=' + Format(PaymentAmount), Response);
+        if not Response.IsSuccessStatusCode() then
+            Error('HTTP %1', Response.HttpStatusCode());
+    end;
+}