[Infra] Optimize CI: right-size resource classes, drop unused coverage, increase xdist workers

Downgrade langfuse, assistants, and python 3.13 install jobs to medium (were defaulting to large at ~25% CPU).
Bump enterprise and image_gen xdist workers to -n 4 on explicit large instances.
Drop coverage collection and persist_to_workspace for 4 jobs that no longer need it.
Downgrade verbosity from -vv to -v across all 5 jobs.

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

.circleci/config.yml

@@ -322,6 +322,7 @@ jobs:
           username: ${DOCKERHUB_USERNAME}
           password: ${DOCKERHUB_PASSWORD}
     working_directory: ~/project
+    resource_class: medium
 
     steps:
       - checkout
@@ -400,22 +401,11 @@ jobs:
           command: |
             pwd
             ls
-            python -m pytest -vv tests/local_testing --cov=litellm --cov-report=xml -x --junitxml=test-results/junit.xml --durations=5 -k "langfuse"
+            python -m pytest -v tests/local_testing -x --junitxml=test-results/junit.xml --durations=5 -k "langfuse"
           no_output_timeout: 15m
-      - run:
-          name: Rename the coverage files
-          command: |
-            mv coverage.xml langfuse_coverage.xml
-            mv .coverage langfuse_coverage
-
       # Store test results
       - store_test_results:
           path: test-results
-      - persist_to_workspace:
-          root: .
-          paths:
-            - langfuse_coverage.xml
-            - langfuse_coverage
   caching_unit_tests:
     docker:
       - image: cimg/python:3.11
@@ -1113,6 +1103,7 @@ jobs:
           username: ${DOCKERHUB_USERNAME}
           password: ${DOCKERHUB_PASSWORD}
     working_directory: ~/project
+    resource_class: medium
 
     steps:
       - checkout
@@ -1127,7 +1118,6 @@ jobs:
             pip install "respx==0.22.0"
             pip install "pytest-retry==1.6.3"
             pip install "pytest-asyncio==0.21.1"
-            pip install "pytest-cov==5.0.0"
       # Run pytest and generate JUnit XML report
       - setup_litellm_enterprise_pip
       - run:
@@ -1135,21 +1125,11 @@ jobs:
           command: |
             pwd
             ls
-            python -m pytest tests/local_testing/ -vv -k "assistants" --cov=litellm --cov-report=xml -x -s -v --junitxml=test-results/junit.xml --durations=5
+            python -m pytest tests/local_testing/ -v -k "assistants" -x --junitxml=test-results/junit.xml --durations=5
           no_output_timeout: 15m
-      - run:
-          name: Rename the coverage files
-          command: |
-            mv coverage.xml litellm_assistants_api_coverage.xml
-            mv .coverage litellm_assistants_api_coverage
       # Store test results
       - store_test_results:
           path: test-results
-      - persist_to_workspace:
-          root: .
-          paths:
-            - litellm_assistants_api_coverage.xml
-            - litellm_assistants_api_coverage
   llm_translation_testing:
     docker:
       - image: cimg/python:3.11
@@ -1690,6 +1670,7 @@ jobs:
           username: ${DOCKERHUB_USERNAME}
           password: ${DOCKERHUB_PASSWORD}
     working_directory: ~/project
+    resource_class: large
 
     steps:
       - checkout
@@ -1720,22 +1701,11 @@ jobs:
             pwd
             ls
             prisma generate
-            python -m pytest -vv tests/enterprise --cov=litellm --cov-report=xml -x -s -v --junitxml=test-results/junit-enterprise.xml --durations=10 -n 2
+            python -m pytest -v tests/enterprise -x --junitxml=test-results/junit-enterprise.xml --durations=10 -n 4
           no_output_timeout: 15m
-      - run:
-          name: Rename the coverage files
-          command: |
-            mv coverage.xml litellm_mapped_tests_coverage.xml
-            mv .coverage litellm_mapped_tests_coverage
-
       # Store test results
       - store_test_results:
           path: test-results
-      - persist_to_workspace:
-          root: .
-          paths:
-            - litellm_mapped_tests_coverage.xml
-            - litellm_mapped_tests_coverage
   batches_testing:
     docker:
       - image: cimg/python:3.11
@@ -1877,6 +1847,7 @@ jobs:
           username: ${DOCKERHUB_USERNAME}
           password: ${DOCKERHUB_PASSWORD}
     working_directory: ~/project
+    resource_class: large
 
     steps:
       - checkout
@@ -1898,22 +1869,11 @@ jobs:
           command: |
             pwd
             ls
-            python -m pytest -vv tests/image_gen_tests -n 2 --cov=litellm --cov-report=xml -x -v --junitxml=test-results/junit.xml --durations=5
+            python -m pytest -v tests/image_gen_tests -n 4 -x --junitxml=test-results/junit.xml --durations=5
           no_output_timeout: 15m
-      - run:
-          name: Rename the coverage files
-          command: |
-            mv coverage.xml image_gen_coverage.xml
-            mv .coverage image_gen_coverage
-
       # Store test results
       - store_test_results:
           path: test-results
-      - persist_to_workspace:
-          root: .
-          paths:
-            - image_gen_coverage.xml
-            - image_gen_coverage
   logging_testing:
     docker:
       - image: cimg/python:3.11
@@ -2051,6 +2011,7 @@ jobs:
           username: ${DOCKERHUB_USERNAME}
           password: ${DOCKERHUB_PASSWORD}
     working_directory: ~/project
+    resource_class: medium
 
     steps:
       - checkout
@@ -2072,7 +2033,7 @@ jobs:
           command: |
             pwd
             ls
-            python -m pytest -vv tests/local_testing/test_basic_python_version.py
+            python -m pytest -v tests/local_testing/test_basic_python_version.py
   helm_chart_testing:
     machine:
       image: ubuntu-2204:2023.10.1 # Use machine executor instead of docker
@@ -3648,7 +3609,7 @@ jobs:
             python -m venv venv
             . venv/bin/activate
             pip install coverage
-            coverage combine realtime_translation_coverage ocr_coverage search_coverage mcp_coverage litellm_mcps_tests_coverage logging_coverage audio_coverage local_testing_part1_coverage local_testing_part2_coverage litellm_assistants_api_coverage langfuse_coverage caching_coverage image_gen_coverage pass_through_unit_tests_coverage batches_coverage guardrails_coverage litellm_mapped_tests_coverage
+            coverage combine realtime_translation_coverage ocr_coverage search_coverage mcp_coverage litellm_mcps_tests_coverage logging_coverage audio_coverage local_testing_part1_coverage local_testing_part2_coverage caching_coverage pass_through_unit_tests_coverage batches_coverage guardrails_coverage
             coverage xml
       - codecov/upload:
           file: ./coverage.xml