v2.0.8

• release: bump everything to 2.0.8
• mcp: drain proxy /notify queue at agent turn start
• viewer/test: skip bin target from cargo test (--lib --tests)
• api/test: bump FUNCTIONS_INVENTIONS_SUBSCRIBE_TOOLS_TIMEOUT 60s -> 5min
• README: reframe execution modes as actions; drop vector completions as user surface
• README: remove all logprob references
• README: reposition as 'The Swarm Judgment Harness'
• build artifacts: regenerated SDKs from clean build
• README: full refactor — packages grid, binaries table, comprehensive sections
• build: drop objectiveai-dotnet from the root build pipeline
• updater + skipreason: add #[schemars(title = "...")] on each variant
• plugins install: split into github and filesystem subcommands
• viewer-plugins: remote URL as iframe source (alongside zip bundles)
• plugins/resolve: multi-extension fallback for plugin binaries
• updater: shared sdk module, JSONL emission, opt-in feature for all 4 binaries
• clear-cache.sh: empty contents in place, preserve junctions/dirs
• objectiveai-mcp-cli: update CLI invocation to new run() signature
• release: add objectiveai-mcp binary releases (objectiveai-mcp-cli crate)
• install.sh + README: install all three binaries (cli + api + viewer)