feat: add msglib message source metadata

scripts/verify-msglib-sidecar.ps1

@@ -47,6 +47,8 @@ if (-not $self.ok -or $self.data.sidecar_name -ne "MsgLibReadSidecar" -or $self.
 $providerChecked = $false
 $displaySources = $null
 $displayEntitySummaries = @()
+$messageSources = $null
+$messageSourceSummaries = @()
 if ($SQLiteDllPath -and $DbPath) {
     if (-not (Test-Path -LiteralPath $SQLiteDllPath)) {
         throw "SQLite DLL not found: $SQLiteDllPath"
@@ -70,6 +72,29 @@ if ($SQLiteDllPath -and $DbPath) {
         throw "display_sources failed"
     }
 
+    $messageSources = Invoke-SidecarJson @{
+        protocol = "isphere.msglib.v1"
+        request_id = "verify-message-sources"
+        op = "message_sources"
+        args = @{
+            sqlite_dll_path = $SQLiteDllPath
+            db_path = $DbPath
+            password = "123"
+        }
+    }
+    if (-not $messageSources.ok -or -not $messageSources.data.metadata_only -or -not $messageSources.data.read_only -or $messageSources.data.message_body_values_returned -or $messageSources.data.raw_rows_returned -or $messageSources.data.file_paths_returned) {
+        throw "message_sources failed"
+    }
+    foreach ($source in @($messageSources.data.message_sources)) {
+        $messageSourceSummaries += [ordered]@{
+            source = $source.source
+            table = $source.table
+            role = $source.role
+            available = $source.available
+            row_count = $source.row_count
+        }
+    }
+
     foreach ($entityType in @("contacts", "groups")) {
         $displayEntities = Invoke-SidecarJson @{
             protocol = "isphere.msglib.v1"
@@ -104,4 +129,9 @@ if ($SQLiteDllPath -and $DbPath) {
     provider_checked = $providerChecked
     display_source_count = if ($displaySources) { $displaySources.data.display_sources.Count } else { 0 }
     display_entity_summaries = $displayEntitySummaries
+    message_source_count = if ($messageSources) { $messageSources.data.message_sources.Count } else { 0 }
+    message_source_summaries = $messageSourceSummaries
+    message_body_values_returned = $false
+    raw_rows_returned = $false
+    file_paths_returned = $false
 } | ConvertTo-Json -Depth 8 -Compress