Desktop, the gateway and a scripted `hermes update` have no TTY, so the
dependency consent gate refused every catalog provider that declares Python
deps: both migration hooks failed with 'Reinstall declined: dependency install
skipped (non-interactive)' and the provider stayed missing. The agent-start
hook exists precisely for those surfaces.
The configured memory.provider plus security.allow_lazy_installs (read for the
home being migrated) is the consent that let the bundled provider install its
deps on demand; carry it through dashboard_install_plugin ->
install_catalog_entry(assume_deps_consent=...). A terminal still prompts, and
allow_lazy_installs: false still refuses with the install one-liner.
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