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

jest.gateway-http.config.js

@@ -0,0 +1,20 @@
+/**
+ * HTTP integration tests: transpile-only (no ts-jest semantic diagnostics) so the
+ * suite does not pull full strict checking of the SolaceNet → Prisma dependency graph.
+ * Unit tests under src/__tests__/unit/core/gateway use the main jest.config.js.
+ */
+const base = require('./jest.config.js');
+
+module.exports = {
+  ...base,
+  setupFiles: ['<rootDir>/src/__tests__/gateway-http-env-setup.ts'],
+  testMatch: ['**/gateway-rails-http.integration.test.ts'],
+  transform: {
+    '^.+\\.ts$': [
+      'ts-jest',
+      {
+        diagnostics: false,
+      },
+    ],
+  },
+};