feat(workspace): Phase 0.4 — trait-first foundation v0.0.1

Charon sesión 1 (2026-05-19) — primer commit canonical.

Ships the Day 1 unblock surface so all hermanos can compile against Origin
Chain interfaces before Substrate runtime lands (Phase 1).

## origin-chain-types (CORE)
- ProvenanceLedger trait (CHN-7)
- OgcLedger trait (CHN-2)
- ChainBridge trait + BridgeDestination enum (CHN-5)
- GovernanceProposal trait + Vote + VoteStance (CHN-4)
- FeeCalculator trait + pure compute_fee() helper (CHN-8)
- Ogc newtype (18 decimals, 1B genesis hard cap)
- AccountId (Ed25519 32-byte) + Signature (Ed25519 64-byte via serde-big-array)
- AssetHash (BLAKE3 32-byte)
- HardwareTier mirror (Mathi canonical, per ADR-0057)
- AssetQualityTier (Standard | Hero) with gating + Hero surcharge
- ChainError canonical enum (cites Inmutables + CHN-* in messages)

## Stub crates (Phase 1+ scaffolding)
- origin-chain-consensus (Aura+GRANDPA PoA→NPoS, Phase 1)
- origin-coin-tokenomics (OGC + fee matrix + burns, Phase 1-2)
- origin-chain-provenance (asset attestation impl, Phase 2)
- origin-chain-bridges (Polkadot+Eth L2 export-first, Phase 7)
- origin-chain-governance (Foundation DAO, Phase 5)

## Tests: 41 passing (33 unit + 6 stub + 2 doctest)
- Fee math: 7 tests cover EmbeddedArm/Portable/Desktop/Ultra × Standard/Hero
  matrix from CHN-8, including anti-clasista Inmutable #16 enforcement
- Genesis supply: 1B OGC × 10^18 base units fits in u128 with 100x safety margin
- Type sizes: AccountId=32, Signature=64, AssetHash=32, ProposalId=32 canonical
- Serde roundtrips: AssetAttestation, BridgeDestination, VoteStance
- Cross-crate wiring: origin-coin-tokenomics consumes origin-chain-types::fees

## Coordination notes
- DC ORIGIN_CHAIN_FOUNDATION_V1 open in Palace KG (8 sub-decisions CHN-1..CHN-8)
  Proposer: Ergon (proxy — Charon hotfix shipped in Palace v0.9.0-α.5 same day)
  Co-authors: Larihana, Lyra, Mathi, Marihan, Phanes, Codex, Sussi, Palace
  Deadline: 2026-05-26
  1/9 signatures filed so far (Palace ✅ APPROVE 8/8)

Refs: CHN-1..CHN-8, Inmutables #16/#26/#37/#41, ADR-0057, CHARON_ROADMAP_V1

Co-Authored-By: Ergon (interim Pilar 4 author) <ergon@originmetaverse.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/origin-chain-bridges/src/lib.rs

@@ -0,0 +1,35 @@
+//! # origin-chain-bridges
+//!
+//! Cross-chain bridges per **CHN-5** — export-first canonical. Origin assets
+//! attested on Origin Chain bridge OUTWARD to external chains. External NFTs
+//! do NOT auto-import (trust boundary: Origin canon outward).
+//!
+//! ## Phase 7 milestones (Sesiones 51-58)
+//!
+//! - 7.1 Polkadot Agile Coretime registration (Bulk or On-Demand)
+//! - 7.2 XCM channels: USDC/USDT stablecoin liquidity
+//! - 7.3 KILT Protocol integration (academic identity, shared con Sussi)
+//! - 7.4 ERC-20 wrapped OGC specification
+//! - 7.5 Ethereum L2 bridge (Arbitrum via Snowbridge or Wormhole)
+//!
+//! Bitcoin bridge explicitly NOT in V1 per CHN-5.
+
+#![deny(missing_docs)]
+
+/// Placeholder marker for the bridges module. Replaced in Phase 7.1.
+#[derive(Debug, Clone, Copy, Default)]
+pub struct BridgeConfig;
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use origin_chain_types::BridgeDestination;
+
+    #[test]
+    fn destinations_canonical_three_variants() {
+        let _polkadot = BridgeDestination::Polkadot;
+        let _eth = BridgeDestination::EthereumL2;
+        let _kilt = BridgeDestination::Kilt;
+        let _cfg = BridgeConfig;
+    }
+}