chore: gitignore temp/ scratch dir and untrack it

temp/ is local scratch (probe drafts, JSON dumps, debug scripts). It was being
swept into every /save by sync.sh's git add -A. Now ignored + untracked (files
remain on disk; history unchanged).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

temp/bgb-lesley-check.ps1

@@ -1,51 +0,0 @@
-# Check Lesley's email activity since disable
-$ErrorActionPreference = "Stop"
-$lesleyUPN = "lesley@bgbuildersllc.com"
-
-Import-Module ExchangeOnlineManagement
-Connect-ExchangeOnline -UserPrincipalName "sysadmin@bgbuildersllc.com" -ShowBanner:$false
-
-$startDate = (Get-Date).AddDays(-3)
-$endDate = Get-Date
-
-Write-Output "=== MAILBOX STATUS ==="
-$mbx = Get-Mailbox -Identity $lesleyUPN
-$stats = Get-MailboxStatistics -Identity $lesleyUPN
-Write-Output "Type: $($mbx.RecipientTypeDetails)"
-Write-Output "LitigationHold: $($mbx.LitigationHoldEnabled)"
-Write-Output "ItemCount: $($stats.ItemCount)"
-Write-Output "TotalSize: $($stats.TotalItemSize)"
-
-Write-Output "`n=== SENT MESSAGES (last 3 days) ==="
-$sent = Get-MessageTraceV2 -SenderAddress $lesleyUPN -StartDate $startDate -EndDate $endDate
-if ($sent) {
-    $sent | Format-Table Received,RecipientAddress,Subject -AutoSize
-} else {
-    Write-Output "None found"
-}
-
-Write-Output "`n=== RECEIVED MESSAGES (last 3 days) ==="
-$recv = Get-MessageTraceV2 -RecipientAddress $lesleyUPN -StartDate $startDate -EndDate $endDate
-if ($recv) {
-    $recv | Select-Object -First 20 | Format-Table Received,SenderAddress,Subject -AutoSize
-} else {
-    Write-Output "None found"
-}
-
-Write-Output "`n=== INBOX RULES ==="
-$rules = Get-InboxRule -Mailbox $lesleyUPN
-if ($rules) {
-    $rules | Format-Table Name,Enabled,Description -AutoSize
-} else {
-    Write-Output "No inbox rules"
-}
-
-Write-Output "`n=== FORWARDING CONFIG ==="
-Write-Output "ForwardingAddress: $($mbx.ForwardingAddress)"
-Write-Output "ForwardingSmtpAddress: $($mbx.ForwardingSmtpAddress)"
-Write-Output "DeliverToMailboxAndForward: $($mbx.DeliverToMailboxAndForward)"
-
-Write-Output "`n=== FOLDER ITEM COUNTS ==="
-Get-MailboxFolderStatistics -Identity $lesleyUPN | Where-Object { $_.ItemsInFolder -gt 0 } | Sort-Object ItemsInFolder -Descending | Select-Object -First 15 | Format-Table Name,FolderType,ItemsInFolder,FolderSize -AutoSize
-
-Disconnect-ExchangeOnline -Confirm:$false