Add 18 more community AL/BC patterns across appsource, data-modeling, error-handling, security, style, testing, ui, upgrade, and web-services

Second contribution from CURABIS ApS, generalized from patterns observed across real AppSource/PTE development. Cross-checked against the current microsoft/knowledge corpus before opening; several originally-drafted candidates were dropped as duplicates of existing files.

microsoft/knowledge/testing/ui-test-codeunit-naming.bad.al

@@ -0,0 +1,24 @@
+codeunit 50104 "Item Price Testing"
+{
+    Subtype = Test;
+
+    [Test]
+    procedure GetPrice_LogicTest()
+    var
+        Customer: Record Customer;
+        Item: Record Item;
+        UnitPrice, LineDiscPct: Decimal;
+    begin
+        // logic test — fine on its own, but not paired with a UI test below
+        ItemPriceMgt.GetSalesPrice(Customer."No.", Item."No.", '', UnitPrice, LineDiscPct);
+    end;
+
+    [Test]
+    procedure Page_ShowsPrice_UT()
+    var
+        ItemPricePage: TestPage "Item Price";
+    begin
+        // UI test mixed into a logic-test codeunit, and the codeunit lacks the _UT suffix
+        ItemPricePage.OpenNew();
+    end;
+}