A SaaS observability platform that adds tenant and request_id labels to metrics and logs, with automatic redaction and cardinality control to improve visibility, billing, and auditing.

Repository: shaun0927/openchrome Author: shaun0927 # [P1] B-4: Add tenant and request_id labels to metrics and audit logs **Priority:** P1 (SaaS operational visibility) **Group:** SaaS α **Estimated Effort:** 3-5 days **Labels:** saas, observability, metrics, audit Problem: Current metrics lack tenant_id label, preventing identification of tenant resource overuse, billing integration, and incident tenant tracing. Audit logs only have sessionId without tenantId or requestId. Current State: Metrics labeled only by tool, audit logs with sessionId but no tenantId or requestId, error logs lack correlation IDs. Proposed Approach: Add tenant labels to core metrics, implement requestId scheme per HTTP request, extend audit log format with tenantId and requestId, redact sensitive fields, control label cardinality to avoid explosion. Files to create and modify for implementation, detailed implementation steps.