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

docs/solacenet/public/OVERVIEW.md

@@ -0,0 +1,39 @@
+# SolaceNet — public overview
+
+**Audience:** Institutions, integrators, and supervisors evaluating how **capabilities, policy, and rails** are governed in the DBIS Core stack. This page is **non-operational**: it does not expose credentials, internal endpoints, or live tenant data.
+
+---
+
+## What SolaceNet is
+
+**SolaceNet** is the **capability and control plane** in DBIS Core: it registers **what** product functions may run (payment gateway, tokenization, limits, fees, **gateway microservices / rail adapters**), for **whom** (tenant, program, region, channel), and under **which policy** (allow/deny, kill switch, audit). The **Go API gateway** (`dbis_core/gateway/go/`) can enforce capability checks at the edge before traffic reaches Node services.
+
+**Rail and messaging protocols** (for example SWIFT families, DTC/DTCC, telegraphic transfer routes, legacy evidence ingest such as KTT) are **maintained under SolaceNet**—see internal governance: `docs/solacenet/RAIL_AND_PROTOCOL_GOVERNANCE.md`.
+
+---
+
+## What the public should expect
+
+| Topic | Public | Authenticated / contract |
+|--------|--------|---------------------------|
+| **Existence and scope** of SolaceNet | Yes — this document and the info hub page | — |
+| **Capability names and high-level behavior** | Summarized | Full API schemas and runbooks |
+| **Rail adapter wire protocols** | Described at category level only | Message formats, endpoints, keys, IPs |
+| **Production status** | “Integration in progress” where adapters are scaffolds | Environment-specific readiness |
+| **Chain 138 settlement** | Via [info.defi-oracle.io](https://info.defi-oracle.io) hub and explorer | DBIS Rail / RTGS runbooks (restricted) |
+
+---
+
+## Related reading (repository)
+
+- **Governance:** `dbis_core/docs/solacenet/RAIL_AND_PROTOCOL_GOVERNANCE.md`
+- **Protocol gap tracking:** `dbis_core/docs/solacenet/PROTOCOL_GAPS_CHECKLIST.md`
+- **Gaps and inconsistencies (product/doc):** `dbis_core/docs/solacenet/public/GAPS_AND_INCONSISTENCIES.md`
+- **Operator quick reference:** `dbis_core/SOLACENET_QUICK_REFERENCE.md`
+- **Proxmox public hub pointer:** `docs/04-configuration/SOLACENET_PUBLIC_HUB.md`
+- **Authenticated API (integrators):** `GET /api/v1/gateway/rails` and related routes on DBIS Core (see `gateway.routes.ts`); optional `SOLACENET_GATEWAY_RAILS_ENFORCE` — `dbis_core/.env.example`
+
+---
+
+**Version:** 1.0  
+**Last updated:** 2026-04-07