Report Veeam backup copy job sessions

VBR 12+ backup copy jobs showed as Unknown. Get-VBRJob returns the copy
(policy) job, but Get-VBRBackupSession only returns sessions of its
hidden worker jobs, whose JobId matches no listed job, so they were
dropped. Confirmed on a VBR 13.0.2 server with the new diagnostics
script.

- File worker sessions under their policy job via
  Session.GetJob().PolicyJobId (looked up once per worker job), and
  record the source job in details.copied_from
- Add Get-VeeamCollectorDiagnostics.ps1, a read-only report of jobs,
  unmatched sessions and their link properties
- Mock: backup copy policy/worker case and a session from a deleted job

Co-Authored-By: Claude Opus 5.5 <[email protected]>

collectors/veeam/Send-VeeamBackupStatus.ps1

@@ -154,6 +154,17 @@ function Get-RunMessage($Session, [string]$Status, $Tasks) {
     return ($lines -join "`n")
 }
 
+# VBR 12+ backup copy jobs: Get-VBRJob returns the copy (policy) job, but Get-VBRBackupSession
+# returns only the sessions of its hidden worker jobs, one per source job, never the policy's own.
+# Each worker job records its policy in PolicyJobId, so those sessions can be filed under it.
+function Get-PolicyJobId($Session, [hashtable]$KnownJobIds) {
+    try {
+        $policyId = [string]$Session.GetJob().PolicyJobId
+        if ($policyId -and $KnownJobIds.ContainsKey($policyId)) { return $policyId }
+    } catch { }
+    return ''
+}
+
 function ConvertTo-Run($Session, $Job) {
     $status = Get-RunStatus $Session
     $tasks = @()
@@ -169,6 +180,11 @@ function ConvertTo-Run($Session, $Job) {
     if ($failedTasks) { $details.objects_failed = $failedTasks }
     if ($warningTasks) { $details.objects_warning = $warningTasks }
     try { if ($Session.IsRetryMode) { $details.retry = $true } } catch { }
+    # Worker session of a backup copy job: say which source job it copied
+    # (worker sessions are named "<copy job>\<source job>")
+    if ($Session.JobId.ToString() -ne $Job.Id.ToString()) {
+        $details.copied_from = ([string]$Session.JobName -split '\\')[-1]
+    }
 
     $run = [ordered]@{
         external_id = $Session.Id.ToString()
@@ -238,11 +254,20 @@ try {
     $since = (Get-Date).AddHours(-$LookbackHours)
     $jobs = @(Get-VBRJob -WarningAction SilentlyContinue)
 
+    $jobIds = @{}
+    foreach ($j in $jobs) { $jobIds[$j.Id.ToString()] = $true }
+
     # Get-VBRBackupSession returns every session in the database, so fetch once and bucket by job
     $sessionsByJob = @{}
+    $policyByWorker = @{}  # worker job ID -> policy job ID ('' if it isn't a worker of a listed job)
     foreach ($s in Get-VBRBackupSession -WarningAction SilentlyContinue) {
         if ($s.CreationTime -lt $since) { continue }
         $key = $s.JobId.ToString()
+        if (-not $jobIds.ContainsKey($key)) {
+            if (-not $policyByWorker.ContainsKey($key)) { $policyByWorker[$key] = Get-PolicyJobId $s $jobIds }
+            if (-not $policyByWorker[$key]) { continue }
+            $key = $policyByWorker[$key]
+        }
         if (-not $sessionsByJob.ContainsKey($key)) { $sessionsByJob[$key] = New-Object 'System.Collections.Generic.List[object]' }
         $sessionsByJob[$key].Add($s)
     }