Integrant system lifecycle management for Wagoe application.

This namespace defines init-key and halt-key! multimethods for all
system components, providing proper lifecycle management and dependency
injection for the entire application.

Components:
- :wagoe/db-context - Database connection pool and adapter
- :wagoe/user-repository - User data persistence
- :wagoe/session-repository - Session data persistence
- :wagoe/user-service - User business logic orchestration
- :wagoe/logging - Structured logging and audit trails
- :wagoe/metrics - Application and business metrics collection
- :wagoe/error-reporting - Error tracking and alerting
- :wagoe/http-handler - HTTP request routing and handling
- :wagoe/http-server - Jetty HTTP server

Usage:
  (require '[wagoe.config :as config])
  (require '[integrant.core :as ig])
  (def cfg (config/ig-config (config/load-config)))
  (def system (ig/init cfg))
  (ig/halt! system)