obsi 1.0.0

Production-focused tracing, logging, metrics, errors, and W3C context propagation for pure Dart.

1.0.0

• Initial pure Dart observability core with tracing, logs, metrics, errors, W3C context propagation, bounded processors, and lifecycle management.
• Added strict input validation, immutable structured error data, bounded in-flight exports, exporter timeouts and idempotent shutdown.
• Added compatible metric instrument reuse and conflict detection.
• Added internal diagnostics and counters for dropped or failed telemetry.
• Added conformance, failure, lifecycle, fuzz, concurrency and stress tests.
• Added deterministic ratio and parent-based sampling with record-only support.
• Added metric views, temporality/start-time metadata and per-view cardinality.
• Added default SDK resources, composite propagation, central attribute redaction, and bounded error-export backpressure.