feat: SolaceNet gateway rails, IRU marketplace hardening, and docs

- Gateway adapter registry, rails routes, optional SOLACENET_GATEWAY_RAILS_ENFORCE; HTTP integration tests.
- IRU marketplace: rate limits, public routes, notifications/SMTP env docs; marketplace UI constants and flows.
- Quantum proxy legacy protocol types; debank/tezos/GSDS touch-ups; .env.example operator notes.
- SolaceNet doc set (gaps, runbooks, telecom schema example).

Tests: npm run test:iru-marketplace, npm run test:gateway (pass).
Note: full-repo tsc still reports unrelated legacy errors outside this change set.
Made-with: Cursor

package.json

@@ -10,6 +10,9 @@
     "test": "jest",
     "test:watch": "jest --watch",
     "test:coverage": "jest --coverage",
+    "test:iru-marketplace": "jest src/__tests__/iru/marketplace.service.test.ts src/__tests__/integration/api/iru-marketplace-http.integration.test.ts --forceExit --no-cache",
+    "test:gateway": "jest src/__tests__/unit/core/gateway --forceExit --no-cache && jest --config jest.gateway-http.config.js --forceExit --no-cache",
+    "seed:gateway-provider": "ts-node -r tsconfig-paths/register scripts/seed-solacenet-gateway-provider.ts",
     "prisma:generate": "prisma generate",
     "prisma:migrate": "prisma migrate dev",
     "prisma:studio": "prisma studio",
@@ -49,6 +52,7 @@
     "date-fns": "^3.0.6",
     "decimal.js": "^10.4.3",
     "dotenv": "^16.3.1",
+    "ethers": "^6.13.5",
     "express": "^4.18.2",
     "express-rate-limit": "^7.1.5",
     "helmet": "^7.1.0",