Promote validated community knowledge

Move eight net-new rules into the Microsoft layer, remove six overlapping articles, and update review skill discovery and references.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 0b130227-d418-4bc0-9e7d-ec6a37adf039

microsoft/knowledge/security/secrets-isolated-storage.bad.al

@@ -0,0 +1,21 @@
+table 50134 "Api Setup Bad Sample"
+{
+    fields
+    {
+        field(1; "Primary Key"; Code[10]) { }
+
+        // A secret in an ordinary Text field is readable by anyone with table
+        // permission, ships in RapidStart packages and Excel exports, and
+        // appears in record snapshots. No DataClassification tag makes it safe;
+        // it belongs in IsolatedStorage instead.
+        field(10; "API Key"; Text[250])
+        {
+            DataClassification = CustomerContent;
+        }
+    }
+
+    keys
+    {
+        key(PK; "Primary Key") { Clustered = true; }
+    }
+}