The interactive create path rejects a module whose name shadows a built-in
SDK namespace (`kv`, `secrets`, …) so `import "kv"` can't resolve to a user
module, but `pic apply`'s `validate_bundle` skipped the check — a parity gap
that let a manifest create what the dashboard forbids. Gate it on
`ScriptKind::Module` and share the same `RESERVED_MODULE_NAMES` const (now
`pub(crate)`); endpoints remain unrestricted.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>