feat(genesis): Phase 1.7 — Genesis chain_spec BM V2 allocation v0.0.9

Origin Chain runtime canonical ahora tiene 3 genesis presets canonical
materializando BM V2 ratificado David 2026-05-18: development + local_testnet
+ mainnet_genesis. Phase 1 COMPLETE canonical 🎉.

## 3 presets canonical
- development: 1 validator Alice + 100M OGC para dev mode
- local_testnet: Alice+Bob validators + 5 dev accounts × 100M OGC
- mainnet_genesis: 5 Pi 5 validators placeholders + BM V2 1B OGC allocation

## BM V2 allocation canonical materializada
- ECOSYSTEM_ALLOCATION = 400M OGC (40%)
- FOUNDATION_ALLOCATION = 250M OGC (25%)
- PUBLIC_SALE_ALLOCATION = 150M OGC (15%)
- FOUNDING_TEAM_ALLOCATION = 150M OGC (15% — 4yr vesting cliff 12mo)
- EXCHANGE_LIQUIDITY_ALLOCATION = 50M OGC (5%)
- Compile-time assertion canonical: sum MUST equal 1B OGC

## Decisión empírica: drop sp-keyring (version mismatch sp_core stable2512)
Hardcoded Substrate well-known dev account bytes (Alice/Bob/Charlie/Dave/Eve
sr25519 + Alice/Bob Ed25519 GRANDPA). Mismos bytes que sp_keyring retornaría.
Self-contained runtime + version stability + polkadot-js compat preserved.

## Mainnet institutional placeholders canonical
ECO!.../FNDT.../SALE.../TEAM.../LIQD... — David ratifica keys reales
canonical generadas por hardware key ceremony pre-launch Q1 2027.

## 5 Pi 5 validators placeholders canonical
Pattern: 0xCA + 0xFE + index distinguishable canonical en block explorer.
David ratificará Dream House Studios + universidades aliadas Identity Level 3
canonical pre-launch.

## GenesisBuilder API wired
sp_genesis_builder::GenesisBuilder::get_preset() ahora delegates a
genesis_config_presets::get_preset(). preset_names() returns 3 PresetIds.

## Tests +6 nuevos (~63 total workspace)
- bm_v2_allocations_sum_canonical_to_one_billion_ogc
- bm_v2_allocation_ratios_canonical (40/25/15/15/5)
- preset_names_canonical_three_presets
- get_preset_unknown_id_returns_none_canonical
- development_preset_returns_json_canonical (serde roundtrip)
- alice_account_bytes_canonical_substrate (compat sanity)

## Build
- cargo check ~30s cold (genesis presets compile)
- cargo build --release 10.30s warm
- ~63 tests passing total workspace

## Phase 1 COMPLETE canonical 🎉
1.1 ✅ + 1.2 ✅ + 1.3 ✅ + 1.4 ✅ + 1.5 ✅ + 1.6 ✅ + 1.7 ✅
Origin Chain runtime canonical full Substrate composition:
- 7 pallets (System + Timestamp + Balances + TransactionPayment + Aura +
  Grandpa + Session)
- 11 Runtime APIs
- 3 Genesis presets (dev + local + mainnet BM V2)
- Opaque SessionKeys + Executive + RuntimeVersion

Next: Phase 1.6+ split-off origin-chain-node real Substrate service
(sc-service + JSON-RPC + CLI), Phase 2+ custom pallets canonical.

Refs: CHARON_ROADMAP_V1 Phase 1.7, CHN-2 BM V2 allocation ratified David
2026-05-18, SBS-6 ratified DC SUBSTRATE_FOUNDATION_V1

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

crates/origin-chain-runtime/Cargo.toml

@@ -55,6 +55,10 @@ sp-session.workspace = true
 frame-system-rpc-runtime-api.workspace = true
 pallet-transaction-payment-rpc-runtime-api.workspace = true
 
+# Genesis canonical Phase 1.7 — chain_spec BM V2 allocation
+# (sp-keyring removed canonical — hardcoded dev account bytes para version stability)
+serde_json.workspace = true
+
 # SCALE codec canonical
 parity-scale-codec.workspace = true
 scale-info.workspace = true
@@ -91,6 +95,7 @@ std = [
     "sp-genesis-builder/std",
     "sp-transaction-pool/std",
     "sp-session/std",
+    "serde_json/std",
     "frame-system-rpc-runtime-api/std",
     "pallet-transaction-payment-rpc-runtime-api/std",
     "parity-scale-codec/std",