Iteration stderr-markers-2, tasks 3-4 of the stderr-class-markers plan.
aura-runner's four continuing-run diagnostics join the class grammar as
hand-written literals (the #295 boundary keeps the macro owner in the
presentation crate): the stale-dylib warning gains the `aura: ` namespace,
and the three tap/no-nominee notices become `aura: note: ` — the latter
two extracted into pure note-builder fns with unit pins. The two e2e
pins on the cost-model tap string moved with the retag
(research_docs.rs). A new project_nodes e2e exercises the real stale-
dylib load path: fresh build emits nothing, a source newer than the
dylib emits exactly one class-marked warning and still succeeds.
The #313 notice ships on both walk-forward paths: `aura: note: all N
walk-forward windows recorded zero trades` before the summary JSON,
exit 0 untouched (a null result is a valid research result, #198).
Wording and condition live in one shared diag helper taking the
per-window trade counts (orchestrator tidy of the reviewer's
duplicated-predicate residue); the call sites keep only the
path-specific field extraction. Three e2es pin it: the equal-length
degenerate on the synthetic path (exactly one note, no warnings, exit
0, summary unchanged), a traded negative twin, and the real/sugar-path
degenerate gated on the GER40 archive.
refs #278, refs #313
claude
1102d776df