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//! Application layer - orchestration and coordination
//!
//! High-level coordination logic:
//! - Service registry with dependency injection
//! - Pipeline executor
//! - Configuration management
/// Service registry for dependency injection
/// Pipeline executor orchestration
/// Configuration management
/// CLI interface
/// LLM extraction service with provider fallback
/// Intelligent schema discovery from content and HTML
/// Advanced TOML pipeline definitions: parsing, template expansion, DAG validation, DOT/Mermaid export
/// Registry for named GraphQL target plugins
/// Prometheus metrics counters, histograms, gauges and tracing initialisation
/// Health check reporting for Kubernetes liveness and readiness probes
/// REST API server for pipeline management (T30) + web dashboard (T31)