Routine chains: ordering, binding, and corpus residue

Correlated value-arg DataType binding: mixed (Field-overload) routine calls type argument-sourced values by their Java paramType read, not a two-arg DSL.val(v, dataType); jOOQ’s TVF codegen exposes no Parameter constants to reference. Shares the enum/ID-as-String coercion residue with the R300 root slice. Lift the parameter DataType onto RoutineRef.ArgBinding at the parse boundary when either site needs it.

Corpus documents for the chain shapes: the R435 fixtures live in `GraphitronSchemaBuilderTest’s R435 block; authoring corpus examples for them per the classified-corpus loop retires whatever in that block is pure verdict and leaves the slot assertions where they are.