Release 2.12 907

[Ousret]

2.12.907 (2024-01-12)

• Fixed our thread safety protection against the experimental freethreaded Python build.
  As expected, the absence of GIL challenged our implementation of TrafficPolice and
  took it to its knees. We reviewed the in-depht logic and improved it for maximum resilience
  and performance. We backported some improvements in AsyncTrafficPolice when applicable.
• Improved error message whenever the pool capacity have been exhausted.
• Fixed background discrete watcher that never reached some connections in the pool.
• Bumped allowed upper bound for python-socks to 2.6.1 (we will have to manually increase the upper bound
  each minor/patch version due to our complex integration that invoke private classes/APIs)