v0.1.17
Change: Metrics exporter now uses DELTA temporality for histogram instruments.
Impact:
- Each export reports per-interval deltas for gen_ai.client.token.usage, gen_ai.client.operation.duration, and gen_ai.client.operation.cost, instead of ever-growing cumulative sums.
- Prevents runaway cost/token inflation in downstream aggregations, especially when exports run every 5 seconds.
- Fully backward-compatible for tracing; only metric aggregation changes.