chore: update AI platform integration

Update HLL Vietnam AI Platform integration with ai-platform.json, extended task lifecycle folders, config-aware runner, lightweight validation, report ignore rules, and platform documentation updates.

scripts/run-integration-tests.ps1

@@ -1,3 +1,47 @@
-Write-Host "HLL Vietnam integration validation"
-Write-Host "No integration tests are configured for the current repository scope."
+$ErrorActionPreference = "Stop"
+
+Write-Host "HLL Vietnam platform validation"
+
+$configPath = "ai-platform.json"
+if (-not (Test-Path $configPath)) {
+    throw "Missing $configPath"
+}
+
+$config = Get-Content -Raw $configPath | ConvertFrom-Json
+$taskPaths = $config.workflow.task_paths
+
+$requiredTaskPaths = @(
+    $taskPaths.pending,
+    $taskPaths.in_progress,
+    $taskPaths.review,
+    $taskPaths.blocked,
+    $taskPaths.obsolete,
+    $taskPaths.done
+)
+
+foreach ($path in $requiredTaskPaths) {
+    if (-not $path -or -not (Test-Path $path)) {
+        throw "Missing task lifecycle path: $path"
+    }
+}
+
+$gitignore = Get-Content -Raw ".gitignore"
+$requiredIgnoreRules = @(
+    "backend/runtime/",
+    "ai/reports/*.md",
+    "!ai/reports/.gitkeep"
+)
+
+foreach ($rule in $requiredIgnoreRules) {
+    if ($gitignore -notmatch [regex]::Escape($rule)) {
+        throw "Missing .gitignore rule: $rule"
+    }
+}
+
+if (-not (Test-Path "ai/reports/.gitkeep")) {
+    throw "Missing ai/reports/.gitkeep"
+}
+
+Write-Host "No product integration tests are configured for this platform-only scope."
+Write-Host "Platform validation passed."
 exit 0