Refactor local model configurations and update tests

feat: Add images and enhance documentation for Field Notes series, improving visual context and clarity

feat: Enhance Secret Keeper's response logic to confirm correct guesses and improve consistency in answers

Add Field Notes series: Parts 2-5 covering scenarios, architecture, and ledger design

feat: Implement early termination for the judge in Twenty Sprouts game and enhance event handling

feat: Add comprehensive state of the engine documentation

feat: unify model catalogue and self-hosted routing

feat: update model endpoint URLs and enhance documentation with mermaid diagrams

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