feat: relax requests lower bound to >=2.31.0 for MWAA compatibility

Lower the requests minimum version from 2.32.3 to 2.31.0 to support
MWAA environments that may ship with older requests versions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: zongsizhang

pyproject.toml

@@ -8,7 +8,7 @@ readme = "README.md"
 license = "Apache-2.0"
 dependencies = [
     "packaging",
-    "requests>=2.32.3",
+    "requests>=2.31.0",
     "websockets>=13.0",
     "tenacity>=8.2.3",
     "cbor2>=5.6.3",