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Procedural macros for tento-lona-connector. Currently ships one
derive: RowKeySchema.
#[derive(RowKeySchema)] parses the rowkey-pattern DSL declared
in a #[rowkey { ... }] attribute, emits one RouteKey marker
per row, and registers each (pattern, verb) pair as a
RowKeySchemaEntry.
For DSL grammar, examples, and conditional compilation see the RowKeySchema derive DSL page on the connector docs.