v5.11.0 - ESM dual-build, MCP 2025 Streamable HTTP, DAG checkpoint, persistent memory

ESM dual-build (exports map + tsconfig.esm.json), McpStreamableServer MCP 2025-03-26 Streamable HTTP transport with resources/prompts, PhasePipeline checkpoint/resume, SemanticMemory file-backed persistence. 3,269 tests across 33 suites.