Surface a bind-bound param in the graph model and the `aura graph` viewer
signature instead of dropping it. A node built with `.bind(slot, value)` keeps
the slot off the tunable surface (param_space / sweep axes — unchanged, correct)
but now ANNOTATES it in the render: all slots shown, the bound one as `name=value`,
dimmed. The cycle-0036 `blend` renders `LinComb[weights[0], weights[1], weights[2]=0.5]`.
Structurally a twin of cycle 0035's instance-name thread: a conditional field
(here `"bound"`) threaded engine -> model -> viewer, plus goldens and a headless
render guard. Render/debug surface only — dropped at lowering (C23), model stays
deterministic (C14).
Auto-signed under the /boss spec auto-sign gate: precondition clean (the one open
notation decision was settled with the user in-session and recorded as a
provenance-bearing reconciliation comment on the issue), self-review + parse-trace
clean, grounding-check PASS, and a unanimous five-lens spec-skeptic panel.
refs #63
Brummel
42850c6f11