Crate schema_registry_observability 

Observability: Prometheus metrics, OpenTelemetry tracing, structured logging

This crate provides comprehensive observability for the LLM Schema Registry:

• 40+ Prometheus metrics (RED + USE + Business metrics)
• Distributed tracing with OpenTelemetry and Jaeger
• Structured JSON logging with correlation IDs
• HTTP and gRPC middleware for automatic instrumentation
• SLI/SLO monitoring support

Re-exports

pub use metrics::MetricsCollector;

pub use tracing_setup::init_tracing;

pub use tracing_setup::setup_tracing;

pub use tracing_setup::shutdown_tracing;

pub use tracing_setup::TracingConfig;

pub use tracing_setup::context as trace_context;

pub use tracing_setup::correlation;

pub use logging::LogContext;

pub use logging::LogSamplingConfig;

pub use logging::ModuleLogLevels;

pub use middleware::metrics_middleware;

pub use middleware::tracing_middleware;

pub use middleware::observability_middleware;

Modules

logging

Structured logging with correlation IDs and contextual fields

metrics

Comprehensive Prometheus metrics instrumentation

middleware

Observability middleware for HTTP and gRPC

tracing_setup

Distributed tracing setup with OpenTelemetry and Jaeger

Macros

log_error

log_info

Helper macros for structured logging

log_warn

Structs

ObservabilityManager

Observability manager that coordinates all observability components