fix(db-run): warn on ERF files passed to /Execute

/Execute is EPF-only; passing .erf causes empty form or type confusion.
db-run now detects .erf extension and launches the database without
/Execute, advising the user to open the report via File→Open.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/db-run/scripts/db-run.ps1

@@ -118,6 +118,15 @@ if ($UserName) { $argString += " /N`"$UserName`"" }
 if ($Password) { $argString += " /P`"$Password`"" }
 
 # --- Optional params ---
+if ($Execute) {
+    $ext = [System.IO.Path]::GetExtension($Execute).ToLower()
+    if ($ext -eq ".erf") {
+        Write-Host "[WARN] /Execute не поддерживает ERF-файлы (внешние отчёты)." -ForegroundColor Yellow
+        Write-Host "       Откройте отчёт через «Файл -> Открыть»: $Execute" -ForegroundColor Yellow
+        Write-Host "       Запускаю базу без /Execute." -ForegroundColor Yellow
+        $Execute = ""
+    }
+}
 if ($Execute) {
     $argString += " /Execute `"$Execute`""
 }