feat: add msglib display entity extraction

scripts/verify-msglib-sidecar.ps1

@@ -46,6 +46,7 @@ if (-not $self.ok -or $self.data.sidecar_name -ne "MsgLibReadSidecar" -or $self.
 
 $providerChecked = $false
 $displaySources = $null
+$displayEntitySummaries = @()
 if ($SQLiteDllPath -and $DbPath) {
     if (-not (Test-Path -LiteralPath $SQLiteDllPath)) {
         throw "SQLite DLL not found: $SQLiteDllPath"
@@ -66,7 +67,31 @@ if ($SQLiteDllPath -and $DbPath) {
         }
     }
     if (-not $displaySources.ok -or -not $displaySources.data.metadata_only -or $displaySources.data.message_body_values_returned) {
-        throw "display_sources failed: $($displaySources | ConvertTo-Json -Depth 12 -Compress)"
+        throw "display_sources failed"
+    }
+
+    foreach ($entityType in @("contacts", "groups")) {
+        $displayEntities = Invoke-SidecarJson @{
+            protocol = "isphere.msglib.v1"
+            request_id = "verify-display-entities-$entityType"
+            op = "display_entities"
+            args = @{
+                sqlite_dll_path = $SQLiteDllPath
+                db_path = $DbPath
+                password = "123"
+                entity_type = $entityType
+                limit = 5
+            }
+        }
+        if (-not $displayEntities.ok -or -not $displayEntities.data.metadata_only -or -not $displayEntities.data.read_only -or $displayEntities.data.message_body_values_returned -or $displayEntities.data.raw_rows_returned) {
+            throw "display_entities failed for $entityType"
+        }
+        $sourceTables = @($displayEntities.data.entities | ForEach-Object { $_.source_table } | Sort-Object -Unique)
+        $displayEntitySummaries += [ordered]@{
+            entity_type = $entityType
+            entity_count = @($displayEntities.data.entities).Count
+            source_tables = $sourceTables
+        }
     }
     $providerChecked = $true
 }
@@ -78,4 +103,5 @@ if ($SQLiteDllPath -and $DbPath) {
     process_bits = $self.data.process_bits
     provider_checked = $providerChecked
     display_source_count = if ($displaySources) { $displaySources.data.display_sources.Count } else { 0 }
-} | ConvertTo-Json -Depth 6 -Compress
+    display_entity_summaries = $displayEntitySummaries
+} | ConvertTo-Json -Depth 8 -Compress