canva-observability

# Canva Observability ## Overview Instrument Canva Connect API calls with metrics, traces, and structured logging. Track latency, error rates, rate limit headroom, and export job completion times. ## Key Metrics | Metric | Type | Labels | Description | |--------|------|--------|-------------| | `canva_api_requests_total` | Counter | `method`, `endpoint`, `status` | Total API calls | | `canva_api_duration_seconds` | Histogram | `method`, `endpoint` | Request latency | | `canva_api_errors_total` | Counter | `endpoint`, `error_code` | Error count | | `canva_export_duration_seconds` | Histogram | `format` | Export completion time | | `canva_token_refresh_total` | Counter | `status` | Token refresh attempts | | `canva_rate_limit_remaining` | Gauge | `endpoint` | Rate limit headroom | ## Prometheus Instrumentation ```typescript import { Registry, Counter, Histogram, Gauge } from 'prom-client'; const registry = new Registry(); const requestCounter = new Counter({ name: 'canva_api_requests_total', help: 'Total Canva Connect API requests', labelNames: ['method', 'endpoint', 'status'], registers: [registry], }); const requestDuration = new Histogram({ name: 'canva_api_duration_seconds', help: 'Canva API request duration', labelNames: ['method', 'endpoint'], buckets: [0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10], registers: [registry], }); const rateLimitGauge = new Gauge({ name: 'canva_rate_limit_remaining', help: 'Remaining rate limit for endpoint', labelName...