Upgrade Cython

Author: cjdsellers

RELEASES.md

@@ -194,7 +194,7 @@ This will be the final release with support for Python 3.11.
 - Optimized `ExecutionEngine` hot path with topic caching and reduced cache lookups
 - Optimized rate limiter quota keys with string interning to avoid repeated allocations
 - Upgraded Rust (MSRV) to 1.90.0
-- Upgraded Cython to v3.1.5
+- Upgraded Cython to v3.1.6
 - Upgraded `databento` crate to v0.35.0
 - Upgraded `datafusion` crate to v50.3.0
 - Upgraded `pyo3` and `pyo3-async-runtimes` crates to v0.26.0

pyproject.toml

@@ -33,7 +33,7 @@ dependencies = [
   "pyarrow>=21.0.0",
   "pytz>=2025.2.0",
   "tqdm>=4.67.1,<5.0.0",
-  "uvloop==0.22.1,<1.0.0; sys_platform != \"win32\"", # Pinned for stability
+  "uvloop==0.22.1,<1.0.0; sys_platform != \"win32\"", # Pinned to 0.22.1 for stability
 ]
 
 [project.urls]
@@ -47,7 +47,7 @@ requires = [
   "setuptools>=80",
   "poetry-core>=2.1.3",
   "numpy>=1.26.4",
-  "cython==3.1.5",
+  "cython==3.1.6",
 ]
 build-backend = "poetry.core.masonry.api"
 
@@ -91,7 +91,7 @@ polymarket = [
 
 [dependency-groups]
 dev = [
-  "cython==3.1.5",
+  "cython==3.1.6",
   "setuptools>=75",
   "black>=25.9.0,<26.0.0",
   "docformatter>=1.7.7,<2.0.0",