Vortex Nexus v0.1.0 — initial public release

First public release of Vortex Nexus, a self-hostable AI gateway and
control plane focused on auditability and governed inference.

Highlights:
- OpenAI-compatible gateway with BYOK-first provider routing and
  optional pass-through billing backed by Postgres wallet escrows
- Rust microservice backend (gateway, auth, policy, control-plane,
  ingest, trace-ingest, audit, query) plus a Next.js console and CLI
- Tamper-evident audit pipeline: canonical hashes, per-tenant Merkle
  batches, signed envelopes, and archive anchoring
- OIDC federated sign-in (Authorization Code + PKCE) with workspace,
  org, and project identity
- Request, session, and trace introspection with tiered telemetry
  separation between tenant analytics and operator health data
- Supply-chain release pipeline: CycloneDX SBOMs, Grype vulnerability
  scans, cosign keyless signing, SLSA provenance, and a release
  evidence report for every container image