fix(ci): install enterprise package into main project venv, not enterprise's own venv

Running `cd enterprise && poetry run pip install -e .` causes poetry to
create a separate venv in `enterprise/.venv` (since enterprise/ has its
own pyproject.toml). The main project's tests run with `.venv/bin/python`,
so the enterprise package installed in `enterprise/.venv` is never seen.

Fix: run `poetry run pip install -e enterprise/` from the repo root so
poetry uses the main project's venv. This ensures litellm_enterprise is
importable when tests run.

This explains why enterprise tests kept failing with:
  AttributeError: '_PROXY_LiteLLMManagedFiles' object has no attribute
  '_check_file_deletion_allowed'
even after --force-reinstall was added — the reinstall was going to the
wrong virtual environment.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.circleci/config.yml

@@ -21,9 +21,7 @@ commands:
       - run:
           name: "Install local version of litellm-enterprise"
           command: |
-            cd enterprise
-            python -m pip install --force-reinstall --no-deps -e .
-            cd ..
+            pip install --force-reinstall --no-deps -e enterprise/
   setup_litellm_test_deps:
     steps:
       - checkout

.github/workflows/test-litellm-matrix.yml

@@ -100,7 +100,7 @@ jobs:
 
       - name: Setup litellm-enterprise
         run: |
-          cd enterprise && poetry run pip install --force-reinstall --no-deps -e . && cd ..
+          poetry run pip install --force-reinstall --no-deps -e enterprise/
 
       - name: Generate Prisma client
         run: |

.github/workflows/test-litellm.yml

@@ -42,9 +42,7 @@ jobs:
         poetry run pip install "openapi-core"
     - name: Setup litellm-enterprise as local package
       run: |
-        cd enterprise
-        poetry run pip install --force-reinstall --no-deps -e .
-        cd ..
+        poetry run pip install --force-reinstall --no-deps -e enterprise/
     - name: Run tests
       run: |
         poetry run pytest tests/test_litellm --tb=short -vv --maxfail=10 -n 4 --durations=50

.github/workflows/test-mcp.yml

@@ -40,9 +40,7 @@ jobs:
 
     - name: Setup litellm-enterprise as local package
       run: |
-        cd enterprise
-        python -m pip install --force-reinstall --no-deps -e .
-        cd ..
+        poetry run pip install --force-reinstall --no-deps -e enterprise/
 
     - name: Run MCP tests
       run: |