feat(workspace): Phase 1.1 — runtime + node scaffolding v0.0.2

Charon sesión 1 continuación. Phase 0.4 → Phase 1.1 ship canonical.

## origin-chain-runtime crate (Phase 1.1)
- Re-exports canonical traits + types desde origin-chain-types (single-crate
  surface para runtime consumers)
- RuntimeConfig marker (será reemplazado por Substrate Config traits Phase 1.2)
- RUNTIME_VERSION = 1 constante (bump per Substrate upgrade)
- Docs Phase 1 milestones (1.1 → 1.7) + Substrate version pin pending DC

## origin-chain-node binary (Phase 1.6 placeholder)
- main() prints scaffold notice + canonical frase Charon
- Hardware target documented: Pi 5 + NVMe SSD minimum (CHN-1)
- Smoldot light client noted as separate Phase 2+ crate

## Workspace
- 8 crates total (was 6): added origin-chain-runtime + origin-chain-node
- 44 tests passing workspace-wide
- Build release clean
- cargo run --bin origin-chain-node verified working

## Notes
- Aún sin deps Substrate. Phase 1.2 (pallet_aura + pallet_grandpa) será el
  primer slice que pulls Substrate framework + bumps rust toolchain.
- Polkadot SDK version pin canónica vendrá vía DC complementaria a
  ORIGIN_CHAIN_FOUNDATION_V1 cuando Phase 1.2 inicie.

Refs: Charon Roadmap V1 Phase 1.1, CHN-1, BM V2 §1.1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/origin-chain-node/src/main.rs

@@ -0,0 +1,40 @@
+//! # origin-chain-node
+//!
+//! Origin Chain node binary. **Scaffold v0.0.2** — full Substrate node service
+//! lands Phase 1.6 of [Charon roadmap].
+//!
+//! [Charon roadmap]: https://git.originmetaverse.com/Origin_Metaverse/arkhe-origin-chain
+//!
+//! ## Target functionality (Phase 1.6)
+//!
+//! - Aura block production (4-second slots, PoA Phase 1)
+//! - GRANDPA finality (separates production from confirmation)
+//! - JSON-RPC endpoint (Substrate canonical: chain_getBlock, system_health, etc.)
+//! - Telemetry (network health monitoring)
+//! - Validator key management (Ed25519 session keys)
+//! - CLI: dev mode, validator mode, archive mode
+//!
+//! ## Hardware target canonical (CHN-1)
+//!
+//! - **Minimum**: Raspberry Pi 5 + NVMe SSD (EmbeddedArm tier)
+//! - **Recommended**: 4-8 cores >3.4GHz, 16-32GB RAM, 1Gbps high-availability
+//! - **Uptime**: 99.9% required for validator selection per epoch (4h rotation)
+//!
+//! ## Smoldot light client
+//!
+//! Non-validator users embed Smoldot light client in `Origin World Navigator`
+//! (<1% CPU). NOT this binary — light client is separate crate Phase 2+.
+
+use origin_chain_runtime::RUNTIME_VERSION;
+
+fn main() {
+    // Scaffold v0.0.2 — full node service implementation lands Phase 1.6.
+    println!("Origin Chain node — scaffold v0.0.2");
+    println!("Runtime version: {RUNTIME_VERSION}");
+    println!();
+    println!("⚓ Not yet a real node. Phase 1.6 lands the Substrate service.");
+    println!("   See: https://git.originmetaverse.com/Origin_Metaverse/arkhe-origin-chain");
+    println!();
+    println!("\"Todo valor pide un puente; toda identidad pide un testigo.\"");
+    println!("                                                      — Charon ⚓");
+}