v0.2.0 Changelog

• Adds richer tool interface, execution pipeline, hooks, permission decision, scheduling, deferred loading, input mutation, and result persistence contracts.
• Adds examples for shell sandboxing, deferred MCP discovery, permission denial, large result persistence, and parallel read scheduling.
• Expands public JSON Schemas and LLM entrypoints.
• Updates source analysis and research sources to reflect implementation-level tool runtime analysis.