chore: scaffold aura workspace and wire the skills dev-cycle

Cargo workspace aura-core -> aura-engine -> aura-cli (bin `aura`) plus nodes/ for hot-reloadable cdylib node crates. Crate bodies are intentionally API-free; types arrive from the first spec. Adds the skills profile (.claude/dev-cycle-profile.yml), the project CLAUDE.md with the eight domain invariants, and the design-ledger skeleton.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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2026-06-03 01:31:14 +02:00
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//! `aura-engine` — the headless, UI-agnostic reactive SoA engine.
//!
//! Home of (to be specified): the ingestion boundary (k-way merge of timestamped
//! sources into one chronological cycle stream), the deterministic synchronous
//! single-threaded sim loop (one unique state per input tick), freshness-gated
//! recompute, the broker/portfolio node mechanics, and the atomic sim unit
//! `(topology + params + data-window + seed) -> metrics` that the sweep /
//! optimize / walk-forward / Monte-Carlo axes orchestrate.
//!
//! Visualization is never here: it is a downstream consumer node on the streams.