generate-app-catalog.sh gains opt-in EMBED_MANIFESTS=1: embeds each
apps/<id>/manifest.yml into its catalog entry's `manifest` field (whole document,
top-level app: preserved — exactly what the Rust side deserializes). Default off
so routine catalog regen is unchanged during the migration window; turn on
deliberately, then sign via the existing release-root ceremony. Verified: default
embeds 0; EMBED_MANIFESTS=1 embeds 40 manifests (generated_secrets preserved).
Adds a round-trip guard test: every shipped apps/*/manifest.yml must deserialize
+ validate through catalog_manifest_to_overlay (image apps accepted, build apps
defer to disk) — catches schema drift between disk manifests and the catalog path.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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