v0.6.0

Added

• Workers AI signature client (signature_spec.client: "workers-ai"): the
  Cloudflare adapter emits env.AI.run(...) with schema-locked JSON output
  (response_format: json_schema) routed through an AI Gateway — no vendor
  SDK and no API key (the AI binding is the auth). Env / wrangler.jsonc /
  secrets are now client-aware: the AI binding appears when a judge targets
  workers-ai, and only the API keys actually used are emitted.
• Roteness in the eval scorecard: deterministic steps / total steps, a
  purely structural code-vs-inference ratio (0% = agent loop, 100% = pure
  code) that never depends on a model estimate — the honest counterweight to
  the empirical determinism metric. On SamplingSurface.roteness,
  Scorecard.to_dict(), and the markdown scorecard.
• MCP-backed external_call nodes: an IR mcp: binding (server / tool /
  args / url / transport) lets a compiled pipeline call the MCP tool
  the source skill used, over Streamable HTTP, instead of emitting a
  NotImplementedError stub — so the output runs out of the box. The DBOS
  adapter emits a working FastMCP client call by default
  (external_backend="mcp"); api falls back to the direct-SDK impl.
  Verified end-to-end against a live mock MCP server (tests/test_mcp_e2e.py).
• rote emit/rote compile gained --backend mcp|api to choose that
  backend at emit time (adapter factories now accept forwarded options).
• rote eval harness: an auto-emitted scorecard.md with a static
  before/after estimate of speed, cost, and determinism (live-fetched
  model prices, no hardcoded tables), plus rote eval --run for
  empirical trials of both the source skill and the emitted pipeline.
• Open-source project scaffolding: CI on every pull request and push
  (Python 3.11–3.13 matrix + lint/type/sanity gates), SECURITY.md,
  CODE_OF_CONDUCT.md, this changelog, issue/PR templates, Dependabot,
  and a pre-commit config.

Fixed

• Corrected pip install rote[...] → rote-cli[...] across the docs
  (the bare rote name is an unrelated PyPI package).
• Refreshed stale version/adapter/test-count references in the README,
  CONTRIBUTING.md, and the BDR example README.