➕ Add a direct dependency on typing-extensions (#1815)

Add a direct dependency on typing-extensions

Since typing_extensions is directly and unconditionally imported, we
should not rely on an indirect dependency. The minimum version, 4.5.0,
was chosen as the first release that included both
typing_extensions.Self and typing_extensions.deprecated.

Author: musicinmybrain

pyproject.toml

@@ -37,6 +37,7 @@ classifiers = [
 dependencies = [
     "SQLAlchemy >=2.0.14,<2.1.0",
     "pydantic>=2.11.0",
+    "typing-extensions>=4.5.0",
 ]
 
 [project.urls]