fix: cap setuptools <75 for compatible metadata version

Setuptools >=75 generates Metadata-Version 2.4 which twine <6 cannot
upload. Cap to <75 to produce Metadata-Version 2.1.

Author: saschabuehrle

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61.0", "wheel"]
+requires = ["setuptools>=61.0,<75.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -8,7 +8,7 @@ version = "1.1.0"
 description = "Agent runtime intelligence layer — optimize cost, latency, quality, budget, compliance, and energy across AI agent workflows."
 readme = "README.md"
 requires-python = ">=3.9"
-license = "MIT"
+license = {text = "MIT"}
 authors = [
     {name = "Lemony Inc.", email = "hello@lemony.ai"}
 ]