EPIC-19: Analytics, Audit & Observability

Field	Value
Total Story Points	60 SP
Stories	6
Sprints	Sprint 81-85
Priority	P0 - Critical
Dependencies	EPIC-1, EPIC-2

Overview

A production-grade platform requires comprehensive observability for reliability, security compliance, and data-driven decisions. This EPIC covers the three pillars: Logs, Metrics, and Traces.

Three Pillars of Observability

┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐
│      LOGS       │ │     METRICS     │ │     TRACES      │
│                 │ │                 │ │                 │
│ • Audit logs    │ │ • System health │ │ • Request flow  │
│ • App logs      │ │ • Business KPIs │ │ • Distributed   │
│ • Error logs    │ │ • Performance   │ │ • Latency       │
│                 │ │                 │ │                 │
│ Pino+CloudWatch │ │ PostHog+Prom    │ │ OpenTelemetry   │
└─────────────────┘ └─────────────────┘ └─────────────────┘

Stories Summary

Story	Title	SP	Key Features
19.1	Audit Logging	13	Compliance, 7-year retention, integrity
19.2	App Logging	8	Pino, CloudWatch, error tracking
19.3	Business Analytics	13	PostHog, dashboards, KPIs
19.4	System Metrics	10	Prometheus, Grafana
19.5	Distributed Tracing	8	OpenTelemetry, Jaeger
19.6	Alerting	8	PagerDuty, Slack, incidents

Tech Stack

Component	Technology
Logs	Pino → CloudWatch
Audit	PostgreSQL (partitioned)
Analytics	PostHog Cloud
Metrics	Prometheus + Grafana
Tracing	OpenTelemetry + Jaeger
Alerting	PagerDuty / OpsGenie