feat: upgrade OpenWebUI pipes with native HITL

[rlippmann]

Summary

Upgrade both OpenWebUI Pipe reference integrations to version 0.10.0 for the Context Compiler dev13 / Directive Drafter dev2 dependencies, and replace the Directive Drafter transcript-marker approval flow with native OpenWebUI confirmation.

Why

The branch keeps the Pipe integrations aligned with the upgraded Python packages and OpenWebUI lifecycle. Directive Drafter now presents a native __event_call__ confirmation dialog, so the drafted directive is reviewed before it can affect authoritative state. Approved directives go through the Context Compiler Engine; rejected directives do not change state, and no pending approval marker is written into the conversation transcript.

Example metadata

• Enforcement point: Context Compiler Engine state transition
• Domain: task usage and policy directives
• Technology/runtime: Python, OpenWebUI 0.11.0, Ollama, qwen2.5:14b-instruct
• Example type: reference integration
• Does this use directive drafter? should normally be no: Yes; this branch specifically updates the Directive Drafter reference integration.
• Does this derive state from model output? must be no for primary examples: No; model/drafter output is converted to a typed CanonicalDirective, then applied only through the Engine after user confirmation.

Checklist

• Repository scaffolding / governance change
• One primary enforcement point
• Explicit authoritative state
• No model-derived state mutation
• Adversarial stub or equivalent test
• Observable runtime behavior change
• Domain vocabulary is natural
• Framework is secondary to the enforcement point
• Docs updated
• Tests/smoke checks added where practical

Notes

• OpenWebUI pipe frontmatter versions are 0.10.0.
• The basic Pipe continues to provide deterministic local state updates and Ollama passthrough.
• The Directive Drafter Pipe uses native OpenWebUI __event_call__ confirmation for approval.
• Approval is request-scoped and is not durable across an OpenWebUI server restart.
• Validation completed:
  • ./scripts/validate_python.sh — 212 passed, 6 skipped
  • npx --yes markdownlint-cli2 python/reference_integrations/openwebui_pipe/README.md — passed
  • git diff --check — passed
  • Live OpenWebUI 0.11.0 validation — both Pipes loaded; Ollama passthrough, approval, rejection, and authoritative state checks passed.