fix for pull request finding 'Empty except'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

Author: celinaczy

src/pages/api/media/keynoters/buffer-keynoters.py

@@ -27,6 +27,7 @@
     ).decode().strip()
     load_dotenv(os.path.join(repo_root, ".env.local"))
 except (ImportError, subprocess.CalledProcessError):
+    # Optional best-effort .env loading; fall back to existing environment vars.
     pass
 
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