feat(web-api): add session_status to chat.stopStream arguments

[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 instead of a separate agents.sessions.setStatus.

• session_status?: string — the agent session lifecycle status to set after stopping the stream; defaults to active. Acceptable values: active, processing, suspended, closed (the shared agent-session status enum).

Because stop() on the chatStream() helper is typed by ChatStopStreamArguments, this makes session_status type-safe via streamer.stop({ session_status }) as well as a direct client.chat.stopStream(...) call.

Verified

• tsc --noEmit — clean
• biome check — clean
• Exercised end-to-end in a Bolt agent app: streamer.stop({ session_status }) sets the session status on stop as expected.

Notes

Companion to the agent sessions work (agents.sessions.* methods #2703, events #2707). Draft — intended to land in the same release window, timed at/after the argument is published in the public method reference. Java + Python equivalents to follow.

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🦋 Changeset detected

Latest commit: 1e342d8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@slack/web-api	Minor

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.15%. Comparing base (4322e14) to head (1e342d8).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2708   +/-   ##
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  Coverage   89.15%   89.15%           
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  Files          65       65           
  Lines       10383    10383           
  Branches      473      473           
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  Hits         9257     9257           
  Misses       1095     1095           
  Partials       31       31           

Flag	Coverage Δ
cli-hooks	89.15% <ø> (ø)
cli-test	89.15% <ø> (ø)
logger	89.15% <ø> (ø)
oauth	89.15% <ø> (ø)
socket-mode	89.15% <ø> (ø)
web-api	89.15% <ø> (ø)
webhook	89.15% <ø> (ø)

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