feat(trace): finish run-aware demo verification

mvp/demo/scripts/run-interview-demo-check.ps1

@@ -78,9 +78,14 @@ $chat = Invoke-RestMethod @chatRequest
 $chatPath = Join-Path $OutputDir "chat-response.json"
 $chat | ConvertTo-Json -Depth 30 | Set-Content -Encoding UTF8 -Path $chatPath
 
+$runId = $chat.data.runId
+if (-not $runId) {
+    throw "Chat response did not include runId; exact trace verification cannot continue."
+}
+
 $traceRequest = @{
     Method = "Get"
-    Uri = "$BaseUrl/api/diagnosis/$SessionId/trace"
+    Uri = "$BaseUrl/api/diagnosis/$SessionId/trace?runId=$([System.Uri]::EscapeDataString($runId))"
 }
 $trace = Invoke-RestMethod @traceRequest
 
@@ -89,6 +94,7 @@ $trace | ConvertTo-Json -Depth 80 | Set-Content -Encoding UTF8 -Path $tracePath
 
 $feedbackBody = @{
     sessionId = $SessionId
+    runId = $runId
     feedback = "useful"
 } | ConvertTo-Json
 
@@ -136,6 +142,7 @@ $summaryPath = Join-Path $OutputDir "interview-demo-summary.json"
 
 $summary = [ordered]@{
     sessionId = $SessionId
+    runId = $runId
     baseUrl = $BaseUrl
     chatSuccess = $chat.data.success
     verdict = $verdict