Litellm ruff linting enforcement (#5992)

* ci(config.yml): add a 'check_code_quality' step

Addresses https://github.com/BerriAI/litellm/issues/5991

* ci(config.yml): check why circle ci doesn't pick up this test

* ci(config.yml): fix to run 'check_code_quality' tests

* fix(__init__.py): fix unprotected import

* fix(__init__.py): don't remove unused imports

* build(ruff.toml): update ruff.toml to ignore unused imports

* fix: fix: ruff + pyright - fix linting + type-checking errors

* fix: fix linting errors

* fix(lago.py): fix module init error

* fix: fix linting errors

* ci(config.yml): cd into correct dir for checks

* fix(proxy_server.py): fix linting error

* fix(utils.py): fix bare except

causes ruff linting errors

* fix: ruff - fix remaining linting errors

* fix(clickhouse.py): use standard logging object

* fix(__init__.py): fix unprotected import

* fix: ruff - fix linting errors

* fix: fix linting errors

* ci(config.yml): cleanup code qa step (formatting handled in local_testing)

* fix(_health_endpoints.py): fix ruff linting errors

* ci(config.yml): just use ruff in check_code_quality pipeline for now

* build(custom_guardrail.py): include missing file

* style(embedding_handler.py): fix ruff check

litellm/proxy/hooks/prompt_injection_detection.py

@@ -79,7 +79,7 @@ class _OPTIONAL_PromptInjectionDetection(CustomLogger):
 
         if (
             self.prompt_injection_params is not None
-            and self.prompt_injection_params.llm_api_check == True
+            and self.prompt_injection_params.llm_api_check is True
         ):
             if self.llm_router is None:
                 raise Exception(
@@ -146,7 +146,7 @@ class _OPTIONAL_PromptInjectionDetection(CustomLogger):
             - check if user id part of call
             - check if user id part of blocked list
             """
-            self.print_verbose(f"Inside Prompt Injection Detection Pre-Call Hook")
+            self.print_verbose("Inside Prompt Injection Detection Pre-Call Hook")
             try:
                 assert call_type in [
                     "completion",
@@ -156,7 +156,7 @@ class _OPTIONAL_PromptInjectionDetection(CustomLogger):
                     "moderation",
                     "audio_transcription",
                 ]
-            except Exception as e:
+            except Exception:
                 self.print_verbose(
                     f"Call Type - {call_type}, not in accepted list - ['completion','embeddings','image_generation','moderation','audio_transcription']"
                 )
@@ -244,7 +244,7 @@ class _OPTIONAL_PromptInjectionDetection(CustomLogger):
 
         # 3. check if llm api check turned on
         if (
-            self.prompt_injection_params.llm_api_check == True
+            self.prompt_injection_params.llm_api_check is True
             and self.prompt_injection_params.llm_api_name is not None
             and self.llm_router is not None
         ):
@@ -270,7 +270,7 @@ class _OPTIONAL_PromptInjectionDetection(CustomLogger):
                 if self.prompt_injection_params.llm_api_fail_call_string in response.choices[0].message.content:  # type: ignore
                     is_prompt_attack = True
 
-        if is_prompt_attack == True:
+        if is_prompt_attack is True:
             raise HTTPException(
                 status_code=400,
                 detail={