feat: Support streaming

[jnapper7]

Description

This PR adds support for SSE streaming of agent value stream events.

• It does not include support for streams for threads
• CLI arguments for the workflow server to support specifying the host/port/log-level on the command line

Type of Change

• Bugfix
• New Feature
• Breaking Change
• Refactor
• Documentation
• Other (please describe)

Checklist

• I have read the contributing guidelines
• Existing issues have been referenced (where applicable)
• I have verified this change is not present in other open pull requests
• Functionality is documented
• All code style checks pass
• New code contribution is covered by automated tests
• All new and existing tests pass

[mtrinell]

Overall lgtm.

Alongside some minor fixes/comments, unit tests for the new stream_events function are missing.

Also, I see this only supports values stream mode, and not custom. Is this intentional?

[jnapper7]

Overall lgtm.

Alongside some minor fixes/comments, unit tests for the new stream_events function are missing.

Also, I see this only supports values stream mode, and not custom. Is this intentional?

Yes, and yes. The values mode was tested alongside the client in the interest of time. We will need to add the unit tests and custom support later. I did not have a test agent that sent custom stream events yet.

[mtrinell]

Based on the comments above:

• Remove CLI args (not needed imho)
• This PR adds support for values stream mode only. StreamMode type is included in RunCreate(Stateless) requests. This should be checked, so in case stream_mode == custom we should trigger a NotImplemented error

[mtrinell]

lgtm