chargebee/chargebee-php v4.23.0 on PHP Packagist

Added an optional telemetry adapter hook for tracing Chargebee API calls via OpenTelemetry (or any APM). Configure it via the telemetryAdapter client option (or Environment::setTelemetryAdapter). When unconfigured, the SDK skips all telemetry work — no behavior change for existing integrations.
Each API call emits one CLIENT span (chargebee.{resource}.{operation}) with OpenTelemetry HTTP semantic-convention attributes plus chargebee.* attributes. Adapters may inject W3C trace context (traceparent) into outbound request headers for distributed tracing.
Exposed the TelemetryAdapter, RequestTelemetryContext, RequestTelemetryResult, RequestTelemetryError types, the TelemetrySupport helpers, and the TelemetryAttributeKeys constants under the Chargebee\Telemetry namespace.