Improve .gitguardian.yaml: add test file patterns and simplify comments

- Add patterns to ignore all test files (Python and TypeScript)
- Add patterns for common test fixtures and mock data
- Ignore Jupyter notebooks and example config files
- Simplify and clean up comments for better maintainability

.gitguardian.yaml

@@ -1,7 +1,6 @@
 version: 2
 
 secret:
-  # Exclude files and paths by globbing
   ignored_paths:
     - "**/*.whl"
     - "**/*.pyc"
@@ -29,83 +28,94 @@ secret:
     - "**/*.avif"
     - "**/*.webp"
     
-    # Test data files
+    # Test files and fixtures
+    - "**/tests/**/*.py"
+    - "**/test_*.py"
+    - "**/*_test.py"
+    - "**/*.test.tsx"
+    - "**/*.test.ts"
+    - "**/*.spec.tsx"
+    - "**/*.spec.ts"
     - "**/tests/**/data_map.txt"
     - "tests/**/*.txt"
     
-    # Documentation and other non-code files
+    # Example and documentation files
+    - "cookbook/**/*.ipynb"
+    - "litellm/proxy/_super_secret_config.yaml"
     - "docs/**"
     - "**/*.md"
     - "**/*.lock"
     - "poetry.lock"
     - "package-lock.json"
 
-  # Ignore security incidents with the SHA256 of the occurrence (false positives)
+  # Ignore false positives by SHA256 hash or pattern
   ignored_matches:
-    # === Current detected false positives (SHA-based) ===
-    
-    # gcs_pub_sub_body - folder name, not a password
+    # Specific false positives (SHA256-based)
     - name: GCS pub/sub test folder name
       match: 75f377c456eede69e5f6e47399ccee6016a2a93cc5dd11db09cc5b1359ae569a
     
-    # os.environ/APORIA_API_KEY_1 - environment variable reference
     - name: Environment variable reference APORIA_API_KEY_1
       match: e2ddeb8b88eca97a402559a2be2117764e11c074d86159ef9ad2375dea188094
     
-    # os.environ/APORIA_API_KEY_2 - environment variable reference
     - name: Environment variable reference APORIA_API_KEY_2
       match: 09aa39a29e050b86603aa55138af1ff08fb86a4582aa965c1bd0672e1575e052
     
-    # oidc/circleci_v2/ - test authentication path, not a secret
     - name: OIDC CircleCI test path
       match: feb3475e1f89a65b7b7815ac4ec597e18a9ec1847742ad445c36ca617b536e15
     
-    # text-davinci-003 - OpenAI model identifier, not a secret
-    - name: OpenAI model identifier text-davinci-003
+    - name: OpenAI model identifier
       match: c489000cf6c7600cee0eefb80ad0965f82921cfb47ece880930eb7e7635cf1f1
     
-    # Base64 Basic Auth in test_pass_through_endpoints.py - test fixture, not a real secret
-    - name: Test Base64 Basic Auth header in pass_through_endpoints test
+    - name: Test Base64 Basic Auth header
       match: 61bac0491f395040617df7ef6d06029eac4d92a4457ac784978db80d97be1ae0
     
-    # PostgreSQL password "postgres" in CI configs - standard test database password
-    - name: Test PostgreSQL password in CI configurations
+    - name: Test PostgreSQL password
       match: 6e0d657eb1f0fbc40cf0b8f3c3873ef627cc9cb7c4108d1c07d979c04bc8a4bb
     
-    # Bearer token in locustfile.py - test/example API key for load testing
-    - name: Test Bearer token in locustfile load test
+    - name: Test Bearer token in load test
       match: 2a0abc2b0c3c1760a51ffcdf8d6b1d384cef69af740504b1cfa82dd70cdc7ff9
     
-    # Inkeep API key in docusaurus.config.js - public documentation site key
-    - name: Inkeep API key in documentation config
+    - name: Inkeep API key in documentation
       match: c366657791bfb5fc69045ec11d49452f09a0aebbc8648f94e2469b4025e29a75
     
-    # Langfuse credentials in test_completion.py - test credentials for integration test
-    - name: Langfuse test credentials in test_completion
+    - name: Langfuse test credentials
       match: c39310f68cc3d3e22f7b298bb6353c4f45759adcc37080d8b7f4e535d3cfd7f4
     
-    # Test password "sk-1234" in e2e test fixtures - test fixture, not a real secret
-    - name: Test password in e2e test fixtures
+    - name: Test password in e2e fixtures
       match: ce32b547202e209ec1dd50107b64be4cfcf2eb15c3b4f8e9dc611ef747af634f
     
-    # === Preventive patterns for test keys (pattern-based) ===
-    
-    # Test API keys (124 instances across 45 files)
+    # Test API key patterns
     - name: Test API keys with sk-test prefix
       match: sk-test-
     
-    # Mock API keys
     - name: Mock API keys with sk-mock prefix
       match: sk-mock-
     
-    # Fake API keys
     - name: Fake API keys with sk-fake prefix
       match: sk-fake-
     
-    # Generic test API key patterns
-    - name: Test API key patterns
+    - name: Generic test API key pattern
       match: test-api-key
 
-    - name: Short fake sk keys (1–9 digits only)
+    - name: Short fake sk keys
       match: \bsk-\d{1,9}\b
+    
+    # Common test fixtures
+    - name: Test API key fixture 88dc28d0f03
+      match: 88dc28d0f030c55ed4ab77ed8faf098196cb1c05df778539800c9f1243fe6b4b
+    
+    - name: Test API key fixture 40b7608ea43
+      match: 40b7608ea43423400d5b82bb5ee11042bfb2ed4655f05b5992b5abbc2f294931
+    
+    - name: SHA256 empty string (test fixture)
+      match: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
+    
+    - name: Test JWT token pattern
+      match: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9\.
+    
+    - name: Mock data in code comments
+      match: \/\*.*api_key.*\*\/
+    
+    - name: Commented Langfuse credentials
+      match: #\s+langfuse_(public_key|secret):