* feat: introduce OpenTelemetry Tracing decorators (#1257)
* feat: introduce OpenTelemetry Tracing decorators
* update test coverage
* add tests, update fixture
* update noxfile, extras; remove print
* update unit test
* review comments
* feat: instrument metadata ops with OTel tracing (#2) (#1267)
* feat: instrument metadata ops with Otel tracing
* update README plus test
* update decorator name per review session
* fix typo in readme
* feat: OTel tracing media ops initial instrumentation (#1280)
* feat: OTel tracing media ops initial instrumentation
* use download class name as span name
* avoid asserting filtered warnings from otel per open-telemetry/opentelemetry-python#3164
* add copyright and preview note
* comments
part 1 introduce OTel tracing module and decorators
Fixes internal b/330754859