fix(aura-cli, aura-runner): review findings — duplicate --override refusal, live discovery prose, neutral JSON refusal

In-cycle fixes for the independent review of the #319 package, RED-first
for both Importants. A repeated --override path now refuses at the shared
lexer (exit 2, path named) instead of panicking exit 101 through
reopen_all — which also un-misattributes the campaign leg's collision
prose for duplicates. override_paths' refusal points at aura graph
introspect --params (the retired --list-axes reference swept from every
live comment, one explicitly-historical mention remains). exec classifies
file targets through a Result-bearing peek: unparseable JSON refuses
neutrally before any leg is chosen. RunPresentation (single-variant)
removed; run_campaign_returning's contract note names its one deliberate
usage-class exit; C14's routing sentence and C20's family-builder
paragraph amended to current truth (superseded text to the history
sidecars); bench error strings and deletion blank-line runs tidied.

refs #319

crates/aura-runner/src/axes.rs

@@ -64,7 +64,8 @@ pub fn raw_matches_wrapped(raw: &str, wrapped: &str) -> bool {
 /// instead of refusing it.
 #[derive(Debug, PartialEq, Eq)]
 pub enum AxisIntake {
-    /// A legal RAW name (`--list-axes`'s own namespace, #328) — accept as-is.
+    /// A legal RAW name (`aura graph introspect --params`'s own namespace,
+    /// #328) — accept as-is.
     Raw,
     /// A retired WRAPPED name; the carried string is its translated RAW
     /// candidate — never applied silently, only ever surfaced in a refusal.

crates/aura-runner/src/member.rs

@@ -659,8 +659,9 @@ pub fn run_blueprint_member(
 /// against: the loaded signal wrapped in the r-sma scaffolding (stop bound,
 /// reduce, no cost), taps discarded. `param_space()` on it is the axis
 /// namespace `--axis` binds; `.axis()` consumes it to seed a sweep. Single
-/// source for the sweep terminal, the MC closed-check, AND `--list-axes`, so
-/// the listed names track the swept names by construction (incl. across #159's
+/// source for the sweep terminal, the MC closed-check, AND
+/// `aura graph introspect --params`, so the listed names track the swept
+/// names by construction (incl. across #159's
 /// harness retirement). The reload is infallible under the SAME
 /// dispatch-boundary contract the callers already rely on: the doc is
 /// `blueprint_from_json`-validated at the `["sweep", ..]` / `["mc", ..]`
@@ -673,7 +674,8 @@ pub fn blueprint_axis_probe(doc: &str, env: &Env) -> Composite {
 /// The axis probe with a #246 override set re-opened on the strategy BEFORE
 /// wrapping — probe and per-member reloads must re-open identically so points
 /// resolve against one space. The empty-set form is byte-equal to the old
-/// probe (mc/run closed-checks and the open `--list-axes` lines read that).
+/// probe (mc/run closed-checks and the open `aura graph introspect --params`
+/// lines read that).
 pub fn blueprint_axis_probe_reopened(doc: &str, env: &Env, overrides: &[String]) -> Composite {
     let signal = blueprint_from_json(doc, &|t| env.resolve(t))
         .expect("doc parse-validated at the dispatch boundary; reload is infallible");
@@ -767,7 +769,7 @@ pub fn override_paths(
             None => {
                 return Err(format!(
                     "axis {name}: names no param of this blueprint (open or bound) — \
-                     see `aura sweep <bp> --list-axes`"
+                     see `aura graph introspect --params <bp>`"
                 ));
             }
         }