Constant STORAGE_MODE_NAMES 

pub const STORAGE_MODE_NAMES: &[&str];

Canonical names of every StorageMode variant, in declaration order.

Single source of truth for the storage-mode name set exported to downstream crates and bindings (Python velesdb.STORAGE_MODES, the integrations security guard). Each entry is the variant’s canonical_name; a unit test asserts the slice stays exhaustive so adding a variant without updating it fails CI.