pico-fastapi REST API with controllers pico-sqlalchemy Database ORM + repositories pico-celery Background tasks pico-pydantic Method-level validation pico-agent LLM agents + tools pico-client-auth JWT + RBAC pico-server-auth Auth server (wallet + JWT) pico-actuator Health + metrics endpoints pico-resilience Retry + circuit breaker + timeout pico-caching Method result caching pico-otel OpenTelemetry traces + metrics pico-scheduling Interval + cron scheduled methods pico-httpx Declarative HTTP clients pico-data-redis Redis client + distributed cache pico-rabbitmq RabbitMQ pub-sub pico-kafka Kafka producers + consumers