[Repo Assist] fix: raise named-argument completion priority to match Property (closes #1500) (#1503)

* fix: raise Argument completion priority to match Property (closes #1500)

Named arguments in constructor and function call contexts (CompletionItemKind.Argument)
were assigned sort priority 5, placing them below Properties (1), Fields (2), Methods (3),
and Events (4). This meant that when triggering completion inside e.g. Person(Name = ...),
the named parameters Age and Name appeared far down the list.

Raise Argument priority to 1 (same as Property) so named arguments appear at the top
of the completion list alongside the type's own properties.

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

* ci: trigger checks

---------

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

Author: github-actions[bot]

src/FsAutoComplete.Core/ParseAndCheckResults.fs

@@ -640,11 +640,14 @@ type ParseAndCheckResults
             match kind with
             | CompletionItemKind.SuggestedName
             | CompletionItemKind.CustomOperation -> 0
+            // Named arguments (constructor/function call context) are the most
+            // immediately relevant completions — give them the same priority as
+            // properties so they appear at the top of the list (closes #1500).
+            | CompletionItemKind.Argument -> 1
             | CompletionItemKind.Property -> 1
             | CompletionItemKind.Field -> 2
             | CompletionItemKind.Method(isExtension = false) -> 3
             | CompletionItemKind.Event -> 4
-            | CompletionItemKind.Argument -> 5
             | CompletionItemKind.Other -> 6
             | CompletionItemKind.Method(isExtension = true) -> 7