Merge main into AL development guidance

Reconcile the read-only plan-enrichment contracts with main's folder-review
inputs and documentation structure. Record Windows alternate streams in
runner evidence and clear the regression harness exit status after expected
negative probes.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 638b66d2-9f06-4f60-8781-808709e1485c

skills/entry.md

@@ -25,6 +25,7 @@ task-context:
     - repository
     - pr-diff
     - file-path
+    - folder-path
   technologies: [al]
   bc-version: 28
   countries: [w1]