Brummel
e97906a0e1
Authoring layers that lower raw literals via `impl Into<Scalar>` (the named-param-binding surface, spec 0030 / #35) rely on a bare integer literal inferring as i64 and a bare float as f64 — because i64/f64/bool are the only `From<…> for Scalar` impls, each literal class resolves to exactly one. This was true but untested: `from_widenings` uses suffixed literals (`7i64`), so a regression in the inference path would survive it. Behaviour-preserving pin of existing aura-core behaviour. Closes the one grounding gap the grounding-check flagged on spec 0030; also guards the property independently — adding a second integer `From` impl would now break loudly here rather than silently at a `.with("knob", 2)` call site. refs #35