ci: test on Python 3.14; correct the version classifiers

requires-python is ">=3.12", so 3.14 is already promised — but the matrix
only proved 3.12 and 3.13. Every local check during Phase 20.2 (3145 tests,
ruff, pyright) ran on 3.14.4, so the code is known good there; CI just did
not attest to it.

Classifiers were stale too: they listed only 3.12 while CI had been testing
3.13 since the workflow was written.

Separable from the error-handling work in this PR — revert this commit alone
if 3.14 turns up a dependency wheel problem on ubuntu runners.

Author: mariomeyer

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v4

pyproject.toml

@@ -21,6 +21,8 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
 ]
 dependencies = [
     "fastmcp>=3.2.0",