Compile a strict row boundary from the effective output schema.
Rows must be plain data objects with exactly the projected string keys.
Accessors, symbols, duplicate fields, missing/extra keys, and hostile proxy
traps fail closed before a value decoder is invoked.
Compile a strict row boundary from the effective output schema.
Rows must be plain data objects with exactly the projected string keys. Accessors, symbols, duplicate fields, missing/extra keys, and hostile proxy traps fail closed before a value decoder is invoked.