Prompt security litellm (#16365)

* add prompt security guardrails provider

* cosmetic

* small

* add file sanitization and update context window

* add pdf and OOXML files support

* add system prompt support

* add tests and documentation

* remove print

* fix PLR0915 Too many statements (96 > 50)

* cosmetic

* fix mypy error

* Fix failed tests due to naming conflict of responses directory with same-named pip package

* Fix mypy error: use 'aembedding' instead of 'embeddings' for async embedding call type

* Fix: Install enterprise package into Poetry virtualenv for tests

The GitHub Actions workflow was installing litellm-enterprise to system Python
using 'python -m pip install -e .', but tests run in Poetry's virtualenv using
'poetry run pytest'. This caused ImportError for enterprise package types.

Changed to 'poetry run pip install -e .' so the package is available in the
same virtualenv where pytest executes.

Fixes enterprise test collection errors in GitHub Actions CI.

* Move Prompt Security guardrail tests to tests/test_litellm/

Per reviewer feedback, move test_prompt_security_guardrails.py from
tests/guardrails_tests/ to tests/test_litellm/proxy/guardrails/ so
it will be executed by GitHub Actions workflow test-litellm.yml.

This ensures the Prompt Security integration tests run in CI.

---------

Co-authored-by: Ori Tabac <[email protected]>
Co-authored-by: Vitaly Neyman <[email protected]>

Author: 3 people

.github/workflows/test-litellm.yml

@@ -37,7 +37,7 @@ jobs:
     - name: Setup litellm-enterprise as local package
       run: |
         cd enterprise
-        python -m pip install -e .
+        poetry run pip install -e .
         cd ..
     - name: Run tests
       run: |