feat: add Fishbowl UI presenter layer and say-vs-think engine support

feat: add optional mem0 cloud backend for memory index and update documentation

feat: unify model catalogue and self-hosted routing

feat: mem0 as a layered, derived semantic memory index

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)

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