messaging.system support pulsar

[crossoverJie]

Changes

messaging.system support pulsar.

[lmolkova]

Thank you for the contribution!

We autogenerate (partially) markdown files. Please add pulsar to the list of systems defined in

semantic-conventions/model/registry/messaging.yaml

Line 147 in b56bad3

members:

.

You can then run markdown generation to add pulsar to all docs - check out https://github.com/open-telemetry/semantic-conventions/blob/main/CONTRIBUTING.md#2-update-the-markdown-files

Please also add a changelog entry.

[crossoverJie]

Thanks for your guidance, done.

[lmolkova]

Thank you!