Promote security knowledge from community to Microsoft layer (#49)

* Promote security knowledge from community to Microsoft layer

Pure git-mv relocation of the SECURITY domain from the community layer to the Microsoft layer. No content changes.

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

* Address review feedback on security knowledge promotion

- do-not-grant-rights-beyond-a-users-entitlement.md: drop the See sample
  reference to a .good.al file that does not exist
- Remove the 'Contributions welcome' boilerplate line from
  compose-permission-sets, prefer-oauth2, and protect-sensitive-data
- protect-sensitive-data-in-temporary-tables: remove the pointless
  DeleteAll on the locally scoped temp buffer in the good sample and
  reword Best Practice to note local buffers are cleaned up automatically
- Drop guard-bulk-operations-with-istemporary from the promotion; it
  stays in the community layer pending a decision on whether it is security

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

* Remove Contributions welcome boilerplate from do-not-grant article for consistency

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

---------

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

microsoft/knowledge/security/protect-sensitive-data-in-temporary-tables.good.al

@@ -0,0 +1,29 @@
+codeunit 50100 "Customer Temp Processor"
+{
+    procedure BuildScopedCustomerBuffer(CustomerNoFilter: Text): Boolean
+    var
+        Customer: Record Customer;
+        TempCustomer: Record Customer temporary;
+    begin
+        // Validate the caller's permission before copying sensitive rows.
+        if not Customer.ReadPermission() then
+            exit(false);
+
+        Customer.SetFilter("No.", CustomerNoFilter);
+        if not Customer.FindSet() then
+            exit(true);
+
+        repeat
+            TempCustomer := Customer;
+            TempCustomer.Insert();
+        until Customer.Next() = 0;
+
+        ProcessCustomerBuffer(TempCustomer);
+        exit(true);
+    end;
+
+    local procedure ProcessCustomerBuffer(var TempCustomer: Record Customer temporary)
+    begin
+        // Use the buffer in-place; do not persist values elsewhere.
+    end;
+}