v2.2.1

• Merge pull request #229 from ObjectiveAI/2-2-1
• release: bump all packages to 2.2.1
• ci: release the objectiveai-db binary (5 legs); activate db update
• test: fix two failures surfaced by the full suite run
• regen: schema + go/py/js SDKs
• tasks run: move stream_all into dangerous_advanced
• tools/plugins run: pass OBJECTIVEAI_BIN_DIR (the cli/ folder)
• tools: add tools install github command (mirror plugins)
• install: extract shared GitHub-install engine for tools + plugins
• regen: json-schema + go/py/js SDKs for manifest reshape
• viewer: detect plugin viewer bundles on disk; nested cli/ layout
• manifests: reshape tool + plugin manifests; drop tool_name helpers
• conduit: always reply in the response variant matching the request
• tools: run from a nested cli/ subfolder, like plugins
• cli: render response timestamps as RFC3339 strings; rename fields