chore(spec): regenerate API surface snapshot for the two added interfaces

Additive only (0 breaking): ApprovalActionAttachment + PresignedDownloadOptions.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: baozhoutao

packages/spec/api-surface.json

@@ -3482,6 +3482,7 @@
     "AnalyticsQuery (interface)",
     "AnalyticsResult (interface)",
     "AnalyticsStrategy (interface)",
+    "ApprovalActionAttachment (interface)",
     "ApprovalActionKind (type)",
     "ApprovalActionRow (interface)",
     "ApprovalDecisionInput (interface)",
@@ -3638,6 +3639,7 @@
     "Plugin (interface)",
     "PluginStartupResult (interface)",
     "PresignedDownloadDescriptor (interface)",
+    "PresignedDownloadOptions (interface)",
     "PresignedUploadDescriptor (interface)",
     "ProposePendingActionInput (interface)",
     "PubSubHandler (type)",