docs(readme, guides, glossary, ledger), bench: the surviving surface everywhere

Slice 8, closing the #319 retirement's prose and bench debt. Bench argv
rides exec (fixed_cost single-run probe, campaign surfaces, and the seed
helper that still called the retired sweep at runtime — caught by the
bench run itself); all five fingerprints unchanged against the committed
baselines, confirming record-line parity through the retirement. Live
docs (README, authoring guide, project layout, glossary) describe only
exec + campaign documents + graph introspect --params; three glossary
entries explicitly mark their verb retired. Ledger amendments per the C29
discipline — C25's executor-verb-set re-settled (exec + the --override
residue), C14's dual grammar reduced to the one dispatch, C24's
document-built runs/families + gated-intake route list (lockstep with the
code comment), C12's override clause and identity anchor repointed to the
runner-layer hash computation, C18/C22/C27/C01 mention rewrites —
superseded sentences moved verbatim to the history sidecars (c25's
created). Stale dual-grammar doc comment on is_blueprint_file rewritten.

refs #319

docs/project-layout.md

@@ -144,9 +144,10 @@ command sequences.
    `ThirdCandleLong` node's `schema` + `eval` in it, against `aura-core`.
 3. **Backtest:** an op-script wiring `ger40_lab_nodes::ThirdCandleLong` (§1,
    `docs/authoring-guide.md`) is built into `blueprints/third-candle-long.json`
-   (`aura graph build`); `aura run blueprints/third-candle-long.json --real
-   GER40 --from 1704067200000 --to 1735689600000` (the window bounds are Unix
-   milliseconds — here 2024) → the strategy produces a broker-independent, unsized
+   (`aura graph build`); `aura exec blueprints/third-candle-long.json` (#319)
+   smoke-runs it over the synthetic stream — a real-data window over `GER40`
+   between two Unix-millisecond bounds is a one-cell campaign document (step
+   4) → the strategy produces a broker-independent, unsized
    **bias stream** (one signed, bounded `f64 ∈ [-1,+1]` per cycle — sign = direction,
    magnitude = optional conviction). A downstream **risk-based executor** (stop-rule →
    position-management, in **R**, the protective stop defining 1R) turns the bias into
@@ -165,7 +166,7 @@ command sequences.
    Monte-Carlo over seeds, or a structural matrix like "these 10 strategies ×
    these 3 instruments × {fixed-stop, vol-stop} risk-executors" — instruments
    × windows × strategy × param axes × process, headless-authorable and
-   registered under `blueprints/`. `aura campaign run <content-id>`
+   registered under `blueprints/`. `aura exec <content-id>` (#319)
    bootstraps the matrix, fans the disjoint sims over all cores (C1), and
    writes the comparable runs to `runs/`.
 5. **Compose:** "combine it with `momentum-filter` as a weighted sum" → Claude