fix: Resolve o3-pro test isolation issues and convert print to logging

- Fix test isolation by clearing LOCALE env var in o3-pro test
- Add restriction service cleanup in test_model_restrictions.py
- Fix PII sanitizer phone regex to not match timestamps
- Convert all print statements to logging in test files per PR review
- Re-record o3-pro cassette with correct environment

🤖 Generated with [Claude Code](https://claude.ai/code)

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

tests/pii_sanitizer.py

@@ -112,7 +112,7 @@ class PIISanitizer:
             ),
             PIIPattern.create(
                 name="phone_number",
-                pattern=r"(?:\+\d{1,3}[\s\-]?)?\(?\d{3}\)?[\s\-]?\d{3}[\s\-]?\d{4}",
+                pattern=r"(?:\+\d{1,3}[\s\-]?)?\(?\d{3}\)?[\s\-]?\d{3}[\s\-]?\d{4}\b(?![\d\.\,\]\}])",
                 replacement="(XXX) XXX-XXXX",
                 description="Phone numbers (all formats)",
             ),