fix: OAuth2 token encoding and /auth/info route

[Coding-Dev-Tools]

• URL-encode 1Password Connect filter keys for special characters\n- Encode OAuth2 introspection tokens\n- Add /auth/info route and tests\n- Fix dead code in serve.py

[github-actions]

🤖 Automated Code Review

✅ Ruff Lint — No issues

⚠️ Ruff Format — Formatting needed

unformatted: File would be reformatted
   --> tests/test_cli_edge_cases.py:34:26
    |
33  |         "project": "test",
    -         "environments": [
    -             {"name": name, "env_file": path} for name, path in env_map.items()
    -         ],
34  +         "environments": [{"name": name, "env_file": path} for name, path in env_map.items()],
35  |     }
--------------------------------------------------------------------------------
171 |         pkg_data = data.get("tool", {}).get("setuptools", {}).get("package-data", {})
    -         assert "envault" in pkg_data, (
    -             "Expected [tool.setuptools.package-data] section for 'envault'"
    -         )
172 +         assert "envault" in pkg_data, "Expected [tool.setuptools.package-data] section for 'envault'"
173 |         assert "py.typed" in pkg_data["envault"], (
--------------------------------------------------------------------------------
182 |             data = tomllib.load(f)
    -         isort_cfg = (
    -             data.get("tool", {}).get("ruff", {}).get("lint", {}).get("isort", {})
    -         )
183 +         isort_cfg = data.get("tool", {}).get("ruff", {}).get("lint", {}).get("isort", {})
184 |         kfp = isort_cfg.get("known-first-party", [])
    |

unformatted: File would be reformatted
   --> tests/test_stores_integration.py:481:23
    |
480 |         encoded_key = quote(key, safe="")
    -         filter_url = f'{base_url}?filter=title%20eq%20%22{encoded_key}%22'

✅ Secret Detection — Clean

✅ Large Files — Within limits

📊 Diff Stats — 6 file(s) changed

 src/envault/auth.py              |  3 ++-
 src/envault/serve.py             | 34 +++-----------------------
 src/envault/stores/__init__.py   | 10 ++++++--
 tests/test_auth.py               | 37 ++++++++++++++++++++++++++++
 tests/test_serve.py              | 25 +++++++++++++++++++
 tests/test_stores_integration.py | 52 ++++++++++++++++++++++++++++++++++++++++
 6 files changed, 127 insertions(+), 34 deletions(-)

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Verdict: ⚠️ Warnings — Lint/format issues found. Recommend fixing before merge.

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