Add 15 community knowledge articles from BC Code Intel ingest

Ingests net-new /community knowledge from BC Code Intelligence, surviving
the admission test, gray-zone salvage, and dedup against the full corpus.

Domains: ui (6), error-handling (3), performance (2), upgrade (1),
appsource (1), security (1), telemetry (1). The two BC24 No. Series
migration drafts are merged into one article.

Adds good/bad AL samples for the clean-fit articles (error-handling,
performance, security, telemetry). UI and appsource remain knowledge-only.

Validator and knowledge-index checks pass (207 articles).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

community/knowledge/performance/deleteall-skips-ondelete-unless-runtrigger.good.al

@@ -0,0 +1,16 @@
+codeunit 50130 "Purge Orders Good Sample"
+{
+    procedure PurgeCancelledLines(var SalesLine: Record "Sales Line")
+    begin
+        // These lines have OnDelete cleanup (reservation entries, item
+        // application). Pass true so DeleteAll runs OnDelete per record and the
+        // cleanup actually happens — the row-by-row cost is accepted on purpose.
+        SalesLine.DeleteAll(true);
+    end;
+
+    procedure PurgeStagingBuffer(var TempBuffer: Record "Name/Value Buffer" temporary)
+    begin
+        // No OnDelete logic to run: the fast, set-based form is correct here.
+        TempBuffer.DeleteAll();
+    end;
+}