Match ComfyUI's dependency floors (#604) and fix the stalled store test race (#603) (#606)

* chore(deps): match ComfyUI's Pillow, aiohttp and numpy floors (#604)

PromptManager never fights ComfyUI on versions: the floors follow its
requirements.txt and Dependabot no longer raises them. The full suite passes on
Pillow 10.1.0 and aiohttp 3.11.8; numpy was tested at 1.26.4, the first with
Python 3.12 wheels. A test that left response bodies unread hung the aiohttp
client before 3.11.11, so it reads them now.

* test(thumbnails): the stalled store call test runs without the probe (#603)

note_failure() wakes the probe, which finds the healthy test folder again at
once, so the next lookup could do store I/O and the test failed intermittently.

tests/test_api_core.py

@@ -796,6 +796,7 @@ class TestRevalidatedCachingBehindMiddlewares(CoreRoutesTestCase):
             self.assertEqual(resp.status, 200, path)
             self.assertEqual(resp.headers.get("Content-Encoding"), "gzip", path)
             self.assertEqual(resp.headers["Cache-Control"], "no-cache", path)
+            await resp.read()  # aiohttp before 3.11.11 hangs on an unread body
             again = await self.client.request(
                 "GET",
                 path,
@@ -806,6 +807,7 @@ class TestRevalidatedCachingBehindMiddlewares(CoreRoutesTestCase):
             )
             self.assertEqual(again.status, 304, path)
             self.assertEqual(again.headers["Cache-Control"], "no-cache", path)
+            await again.read()
 
 
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