v2.2.0-beta0 - beta branch release

What's Changed

• Strategy shift to a single user-facing context tool: compress.
• Context management is less surgical and more focused on preserving high-signal work grouped by task.
• Significantly improved cache invalidation, should be a very minor impact now on all providers especially anthropic
• To try this prerelease, install @tarquinen/opencode-dcp@beta.