fix(cli): drop enum.StrEnum so the CLI imports on Python 3.10

Backport of #41046 to rc/1.102.0.
Cherry-picked from merge commit 1ba97665b2 (main), originally by app/devin-ai-integration.

.github/workflows/test-code-quality.yml

@@ -178,7 +178,7 @@ jobs:
           version: "0.10.9"
 
       - name: Install dependencies
-        run: uv sync --frozen --extra proxy --python 3.10
+        run: uv sync --frozen --extra proxy --extra cli --python 3.10
 
       - run: uv run --no-sync python --version
 
@@ -187,3 +187,6 @@ jobs:
 
       - name: Check litellm CLI
         run: uv run --no-sync litellm --version
+
+      - name: Check lite CLI
+        run: uv run --no-sync lite version

litellm/proxy/client/cli/commands/pi.py

@@ -10,7 +10,7 @@ import os
 import tempfile
 from collections.abc import Callable, Mapping
 from dataclasses import dataclass
-from enum import StrEnum
+from enum import Enum
 from pathlib import Path
 from types import MappingProxyType
 from typing import Annotated, Final
@@ -25,7 +25,7 @@ LITELLM_PROXY_API_KEY_ENV: Final = "LITELLM_PROXY_API_KEY"
 _REJECTED_STATUSES: Final = frozenset((401, 403))
 
 
-class ListingFailure(StrEnum):
+class ListingFailure(str, Enum):
     """Why a proxy could not be listed, decided once where the HTTP outcome is classified.
 
     `unreachable` means no response at all; the other kinds prove the proxy answered, so callers

tests/test_litellm/proxy/client/cli/test_pi.py

@@ -20,6 +20,13 @@ from litellm.proxy.client.cli.commands.pi import (
 )
 
 
+def test_listing_failure_is_str_enum():
+    assert issubclass(ListingFailure, str)
+    assert ListingFailure.REJECTED.value == "rejected"
+    assert ListingFailure("rejected") is ListingFailure.REJECTED
+    assert str(ListingFailure.REJECTED.value) == "rejected"
+
+
 class _FakeResponse:
     def __init__(self, status_code, payload=None):
         self.status_code = status_code