Remove openai-agents exclude-newer override

The openai-agents>=0.17.1 minimum pin no longer requires bypassing the
exclude-newer cooldown: 0.17.1 through 0.17.3 are now older than the 2-week
window. Drop the override so dependency selection is governed solely by the
2-week policy. openai-agents resolves to 0.17.3 (0.17.4 is still inside the
window).

Author: brianstrauch

pyproject.toml

@@ -257,6 +257,3 @@ exclude = ["temporalio/bridge/target/**/*"]
 # Prevent uv commands from building the package by default
 package = false
 exclude-newer = "2 weeks"
-# openai-agents>=0.17.1 is newer than the exclude-newer cooldown window;
-# bypass it since the minimum version pin already constrains the package.
-exclude-newer-package = { openai-agents = false }