feat: add attachment download script and update gitignore

Add Download-AttachmentsFrom.ps1 for searching inbox+archive and
downloading attachments from a specific sender via Graph API.
Exclude downloads/ and .claude/settings.local.json from tracking.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -1,9 +1,15 @@
 # Zugangsdaten NIEMALS einchecken
 config/settings.json
 
+# Downloads
+downloads/
+
 # Logs
 logs/
 
+# Claude Code
+.claude/settings.local.json
+
 # Temporaere Dateien
 *.tmp
 vorlagen/sp_list protokolle.xlsx

scripts/Download-AttachmentsFrom.ps1

@@ -0,0 +1,72 @@
+# Download-AttachmentsFrom.ps1 -- Download attachments from a specific sender
+param(
+    [Parameter(Mandatory)]
+    [string]$SenderEmail,
+
+    [string]$OutputFolder = (Join-Path $PSScriptRoot ".." "downloads" $SenderEmail.Split("@")[0])
+)
+
+$ErrorActionPreference = "Stop"
+
+# Load modules
+Import-Module (Join-Path $PSScriptRoot "Logger.psm1") -Force
+Import-Module (Join-Path $PSScriptRoot "GraphHelper.psm1") -Force
+
+# Load settings
+$settingsPath = Join-Path $PSScriptRoot ".." "config" "settings.json"
+$settings = Get-Content $settingsPath -Raw | ConvertFrom-Json
+$settingsHash = @{
+    TenantId     = $settings.TenantId
+    ClientId     = $settings.ClientId
+    ClientSecret = $settings.ClientSecret
+    MailboxUser  = $settings.MailboxUser
+}
+
+# Init logger
+$logDir = Join-Path $PSScriptRoot ".." "logs"
+Initialize-Logger -LogDirectory $logDir -Level "Info"
+
+Write-Log "Searching emails from: $SenderEmail"
+
+# Search emails from sender across inbox and archive
+$user = $settingsHash.MailboxUser
+$filter = [uri]::EscapeDataString("from/emailAddress/address eq '$SenderEmail' and hasAttachments eq true")
+$folders = @("inbox", "archive")
+$messages = @()
+
+foreach ($folder in $folders) {
+    $endpoint = "/users/$user/mailFolders/$folder/messages?`$top=100&`$select=id,subject,from,receivedDateTime,hasAttachments&`$filter=$filter"
+    try {
+        $result = Invoke-GraphRequest -Endpoint $endpoint -Settings $settingsHash
+        $count = @($result.value).Count
+        Write-Log "Folder '$folder': found $count email(s)"
+        $messages += @($result.value)
+    }
+    catch {
+        Write-Log "Folder '$folder': error or not found, skipping" -Level Warn
+    }
+}
+Write-Log "Found $($messages.Count) emails with attachments from $SenderEmail"
+
+if ($messages.Count -eq 0) {
+    Write-Log "No emails with attachments found. Done."
+    exit 0
+}
+
+# Create output folder
+if (-not (Test-Path $OutputFolder)) {
+    New-Item -ItemType Directory -Path $OutputFolder -Force | Out-Null
+}
+
+$totalFiles = 0
+foreach ($msg in $messages) {
+    $subject = $msg.subject
+    $date = ([datetime]$msg.receivedDateTime).ToString("yyyy-MM-dd")
+    Write-Log "Processing: [$date] $subject"
+
+    $savedFiles = Get-MailAttachments -Settings $settingsHash -MessageId $msg.id -TargetPath $OutputFolder
+    $totalFiles += $savedFiles.Count
+}
+
+Write-Log "Done. Downloaded $totalFiles file(s) to: $OutputFolder"
+Write-Host "`nOutput folder: $OutputFolder"