feat(server): import application logo into file storage at install (#22437)

Installed apps stored the logo as the manifest's relative path but never
imported the file, so the public-assets URL 404'd and logos went missing
in the UI for npm/tarball sources. Import the logo (best-effort — a
declared but unshipped logo is skipped, not fatal) and record it as a
first-class logoFileId on the application so it can be served reliably.



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packages/twenty-server/src/engine/metadata-modules/flat-field-metadata/utils/__tests__/generate-morph-or-relation-flat-field-metadata-pair.spec.ts

@@ -21,6 +21,7 @@ const MOCK_FLAT_APPLICATION: FlatApplication = {
   name: 'Workspace Custom Application',
   description: null,
   logo: null,
+  logoFileId: null,
   version: null,
   workspaceId: 'workspace-id',
   sourceType: ApplicationRegistrationSourceType.LOCAL,