chore: drop Python 3.9 (EOL), add Python 3.14

Update supported Python versions per devguide.python.org/versions:
- Remove 3.9 (end-of-life as of October 2025)
- Add 3.14 (stable as of October 2025)
- Update requires-python to >=3.10
- Add Python version classifiers for PyPI visibility
- Regenerate uv.lock for new Python constraint

Fixes #308

Author: ivanauth

.github/workflows/test.yaml

@@ -23,11 +23,11 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
     steps:
       - uses: "actions/checkout@v6"
       - uses: "authzed/action-spicedb@v1"

pyproject.toml

@@ -3,8 +3,16 @@ name = "authzed"
 version = "0.0.0"
 description = "Client library for SpiceDB."
 authors = [{ name = "Authzed", email = "support@authzed.com" }]
-requires-python = ">=3.9,<4"
+requires-python = ">=3.10,<4"
 readme = "README.md"
+classifiers = [
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3.14",
+]
 dependencies = [
   "grpcio~=1.63",
   "protobuf>=5.26,<7",