DataGrid2 `datasource: microflow` with a parameterized source microflow silently drops the parameter binding (CE1571)

[MendixMau]

Environment: mxcli RnD (commit 504aec6), Mendix 11.12.0, macOS.

While retesting BUG-51 ("quoted reference target before param list breaks parsing" — not
reproducible as originally described, see that file for the negative result), a distinct real
defect turned up in one of the three test contexts.

Steps to reproduce:

datagrid dg1 (datasource: microflow "Module"."GET_ItemByName"(Name: $Filter))

(reproduces identically whether the target is quoted or unquoted — this is unrelated to BUG-51's
quoting claim)

Run mxcli exec then mx check (mxbuild) or mxcli docker check.

Expected: the DataGrid2's microflow datasource binds $Filter to the microflow's Name
parameter, and the app compiles.

Actual:

[error] [CE1571] "No argument has been selected for parameter 'Name' and no default is
available. Please select an argument manually." at Data grid 2 'dg1'

describe page confirms the datasource microflow itself is written correctly
(DataSource: microflow Module.GET_ItemByName), but shows no parameter mapping at all — the
Name: $Filter binding is silently dropped during exec, regardless of quoting.

This is adjacent to the already-known "pluggable DataGrid2 microflow datasource" issue class but
is a distinct symptom — parameter-binding loss, not the datasource itself being dropped — and
should be tracked/fixed separately. Only tested against RnD so far; recommend checking whether
Engalar reproduces the same loss before assuming it's RnD-specific.