feat: official MCP SDK as an optional tool transport

feat: Instructor-validated structured output on the live path

feat: LiteLLM gateway routing profiles to Modal-served small models

feat: env-gated Postgres event store via SQLAlchemy (layered)

feat: update setup instructions and dependencies for uv integration

Refactor code structure for improved readability and maintainability

feat: phase 2 architecture — manifest system, structured output, salience memory, SQLite ledger, observer

feat: phase 1 — memory layer, governor, second scenario, 70 passing tests

feat: scaffold hackathon agent theater