debugger: Do not query threads when session is still building (#32852)

This should silence a noisy log we see whenever a debug session is
started:
`2025-06-17T12:06:12+02:00 ERROR [project] no adapter running to send
request: ThreadsCommand`

Closes #ISSUE

Release Notes:

- Fixed debugger logs getting clobbered with internal logs about Threads
Command whenever a new debug session is created.
d4c9522da7Piotr Osiewicz committed on 6/17/2025, 10:36:46 AM· committed by GitHubparent4b88090
1 file changedLine totals unavailable