Avoid spurious error log in Adaptive

[hendrikmakait]

Due to a timing issue in a synchronous environment, it was possible for Adaptive to log an error (while staying functional) during its startup:

import time
from distributed import LocalCluster

if __name__ == "__main__":
    cluster = LocalCluster()
    for _ in range(100):
        cluster.adapt(minimum=1, maximum=2)
        time.sleep(1)

logs

2024-10-09 07:25:24,947 - tornado.application - ERROR - Exception in callback functools.partial(<bound method Adaptive._start of <distributed.deploy.adaptive.Adaptive object at 0x14e4d56d0>>)
Traceback (most recent call last):
  File "/opt/homebrew/Caskroom/mambaforge/base/envs/dask-distributed/lib/python3.11/site-packages/tornado/ioloop.py", line 750, in _run_callback
    ret = callback()
          ^^^^^^^^^^
  File "/Users/hendrikmakait/projects/dask/distributed/distributed/deploy/adaptive.py", line 177, in _start
    self.minimum,
    ^^^^^^^^^^^^
AttributeError: 'Adaptive' object has no attribute 'minimum'

This PR fixes that.

• Tests added / passed
• Passes pre-commit run --all-files

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    24 files   -     1      24 suites   - 1   9h 53m 58s ⏱️ - 32m 20s
 4 130 tests ±    0   4 015 ✅ +    2    110 💤 ± 0  5 ❌  - 2 
45 028 runs   - 2 680  42 988 ✅  - 2 617  2 034 💤  - 61  6 ❌  - 2 

For more details on these failures, see this check.

Results for commit 115eb95. ± Comparison against base commit 004fafb.

[phofl]

thx