Editor-side vocabulary for the ClickHouse dialect.

config/0 returns the payload the dialect hands back from Lotus.Source.Adapters.Ecto.Dialect.editor_config/0: the sql:clickhouse language identifier, ClickHouse keywords and types including the Nullable and LowCardinality wrappers, function completions with signatures, and the clause names that act as context boundaries for completion.

It carries no :dialect_spec, and CodeMirror ships no ClickHouse grammar, so the editor tokenizes as generic SQL and draws its completions from the lists here rather than from a ClickHouse parser.