Add driver for did:ixo

[Michael-Ixo]

Summary

Adds a Universal Resolver driver for the did:ixo DID method — DIDs anchored on the IXO Impact Hub network (a Cosmos SDK chain), covering account DIDs (did:ixo:ixo1...), entity DIDs (did:ixo:entity:<32hex>), and CosmWasm contract DIDs (did:ixo:wasm:ixo1...).

Checklist per driver development guide

• W3C DID Method Registry: did:ixo is registered — approved and merged via w3c/did-extensions#725
• Method specification: https://ixofoundation.github.io/ns/did/v1/ (JSON-LD context published at https://w3id.org/ixo/ns/did/v1)
• Driver source (Apache 2.0): https://github.com/ixofoundation/ixo-did-resolver
• Docker image (versioned, publicly pullable, linux/amd64): ghcr.io/ixofoundation/ixo-did-resolver:v0.1.5
• W3C DID Test Suite conformance: 351/351 normative tests passing across did-identifier, did-production, did-core-properties, and did-resolution suites — evidence branch: ixoworld/did-test-suite@ixo
• Hosted resolver (same driver, production): https://resolver.ixo.world/1.0/identifiers/did:ixo:ixo1rl9vhhxg0t7ywlh953gtthphg889v7d3e2gx7k
• Contact: Michael Pretorius — michael@ixo.world / @ixofoundation

Files changed

• docker-compose.yml — driver-did-ixo service (port 8181) + web env passthrough
• uni-resolver-web/src/main/resources/application.yml — driver entry with pattern, acceptHeaderValue, test identifiers, traits
• .env — default Impact Hub RPC endpoint (operator-overridable)
• README.md — driver table row + curl example

Tested

Built uni-resolver-web from this branch and ran it with the driver via docker compose; resolution verified end-to-end through the gateway:

GET /1.0/identifiers/did:ixo:ixo1rl9vhhxg0t7ywlh953gtthphg889v7d3e2gx7k  → 200 (DID resolution result)
GET /1.0/identifiers/did:ixo:entity:00046b59059562e773694ea495bc1b23     → 200
GET /1.0/identifiers/did:ixo:wasm:ixo10mdfdff64ee44tyzlqlnf6vh76f8gfd5g… → 200
GET /1.0/identifiers/did:ixo:doesnotexist…                               → 404 (notFound)

/1.0/methods lists ixo and /1.0/testIdentifiers returns both test DIDs. Both test identifiers are permanent mainnet DIDs maintained by the IXO Foundation.

Authored by: Michael Pretorius michael@ixo.world