ci: run the matrix on python versions the project actually supports

The 3.8-3.11 legs were no-ops: requires-python is >=3.12, so uv sync
provisioned a managed >=3.12 interpreter on those runners and re-tested
3.12 four extra times. Replace them with a 3.12 / 3.13 / 3.14 matrix.

Adding 3.14 surfaced a real teardown failure: the workspace conftest's
session finalizer called asyncio.get_event_loop_policy(), deprecated in
3.14, which the filterwarnings=error gate turned into a teardown error
that aborted the finalizer before it closed its loops — leaking them as
PytestUnraisableExceptionWarnings. Switch to asyncio.get_event_loop()
(returns the set loop without warning everywhere; RuntimeError on 3.14+
when none is set). Full suite verified green on 3.12, 3.13, and 3.14.

Also advertise 3.14 in the package classifiers and doc references.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: OmarAlJarrah

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
     steps:
       - name: Checkout
         uses: actions/checkout@v4

CLAUDE.md

@@ -91,7 +91,7 @@ python-sdk/
 ├── pyproject.toml                          # workspace root (uv workspace, dev deps,
 │                                           # ruff/mypy/pytest config)
 ├── uv.lock
-├── .github/workflows/ci.yml                # pytest + mypy + ruff, python matrix 3.8–3.13
+├── .github/workflows/ci.yml                # pytest + mypy + ruff, python matrix 3.12–3.14
 ├── docs/                                   # cross-package documentation: architecture,
 │                                           # auth, bodies, errors, http, pipelines
 └── packages/

README.md

@@ -227,8 +227,8 @@ uv run ruff check                # lint
 uv run ruff format --check       # formatting gate
 ```
 
-CI runs the same gates on Python 3.12 and 3.13 for every push and pull
-request — see [`.github/workflows/ci.yml`](.github/workflows/ci.yml).
+CI runs the same gates on Python 3.12, 3.13, and 3.14 for every push and
+pull request — see [`.github/workflows/ci.yml`](.github/workflows/ci.yml).
 
 ## Conventions
 

conftest.py

@@ -35,9 +35,12 @@ def _own_default_event_loop() -> Iterator[None]:
         yield
     finally:
         # ``pytest_asyncio`` may have replaced the current loop; close
-        # whichever loop the policy currently points at.
+        # whichever loop is current at teardown. ``asyncio.get_event_loop``
+        # (not the policy API — deprecated in 3.14) returns the set loop
+        # without warning on every supported version, and raises
+        # ``RuntimeError`` on 3.14+ when none is set.
         try:
-            current = asyncio.get_event_loop_policy().get_event_loop()
+            current = asyncio.get_event_loop()
         except RuntimeError:
             current = None
         for candidate in {loop, current}:

packages/dexpace-sdk-core/pyproject.toml

@@ -19,6 +19,7 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Libraries",
 ]
 dependencies = ["furl>=2.1.3"]

packages/dexpace-sdk-http-aiohttp/pyproject.toml

@@ -20,6 +20,7 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Libraries",
 ]
 dependencies = [

packages/dexpace-sdk-http-httpx/pyproject.toml

@@ -19,6 +19,7 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Libraries",
 ]
 dependencies = [

packages/dexpace-sdk-http-requests/pyproject.toml

@@ -19,6 +19,7 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Libraries",
 ]
 dependencies = [

packages/dexpace-sdk-http-stdlib/pyproject.toml

@@ -19,6 +19,7 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Libraries",
 ]
 dependencies = [