feat: add session_status to chat.stopStream

[zimeg]

Adds the optional session_status argument to chat.stopStream. When stopping a stream, an app can set the agent session's lifecycle status in the same call.

• sessionStatus — the session status to set after stopping the stream. Defaults to active.

What's included

• sessionStatus field on ChatStopStreamRequest
• session_status form serialization in RequestFormBuilder

Category

• slack-api-client (Slack API Clients)

Notes

Companion to the agent sessions work (agents.sessions.* methods #1633). Draft — intended to land in the same release window, timed at/after the argument is published in the public method reference.

Requirements

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.99%. Comparing base (0bcc88f) to head (5846838).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@ Coverage Diff @@## main #1634 +/- ##
============================================
- Coverage 72.99% 72.99% -0.01% + Complexity 4523 4522 -1 
============================================
Files 479 479 Lines 14365 14366 +1 Branches 1503 1503 ============================================
Hits 10486 10486 - Misses 2989 2990 +1 
Partials 890 890 

Flag	Coverage Δ
jdk-14	72.99% <100.00%> (-0.01%)	⬇️

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