Module observability 

Observability Module

Provides metrics, tracing, and logging for production monitoring.

Architecture

┌─────────────────────────────────────────────────────────────┐
│                    Observability                             │
├─────────────────────────────────────────────────────────────┤
│  Metrics:                                                    │
│    - Query latency histogram                                 │
│    - Query throughput counter                                │
│    - Index size gauge                                        │
│    - Cache hit/miss ratio                                    │
│                                                              │
│  Tracing:                                                    │
│    - Request spans with attributes                           │
│    - Component-level timing                                  │
└─────────────────────────────────────────────────────────────┘

Structs

Metrics

Central metrics collector for RAG++.

MetricsConfig

Metrics configuration.

QuerySpan

Query execution span.

SpanContext

Context for distributed tracing.