consent-engine v0.6.9

fix: v0.6.9 — CLI --jurisdiction accepts UK + MCP-setup docs

CLI: --jurisdiction UK errored ("invalid choice: US, EU, CA") because v0.6.7
added the UK regime everywhere except the CLI choices list. Fixed; choices now
derive from a single SUPPORTED_JURISDICTIONS constant in jurisdiction_detector,
with a test asserting the CLI choices, jurisdiction_copy, and the exposure
framework all stay in sync — the class of bug that let UK slip the CLI.

Docs (README MCP setup): use the absolute uvx path for Claude Desktop (a macOS
GUI app does not inherit the shell PATH, so a bare "uvx" cannot start the
server), warn to quit Desktop before editing its config, add the Claude Code
(claude mcp add) variant, and a short "not showing up?" note.

ruff + mypy strict clean; jurisdiction suite green.

Co-Authored-By: Claude Opus 4.8 (1M context) noreply@anthropic.com