fix: resolve pytest F403 wildcard import linting errors

Added F403 to ruff per-file ignores for test files to allow wildcard
imports in pytest configuration files, which are a common and acceptable
pattern for fixture imports.

Changes:
- pyproject.toml: Added F403 to tests/**/* ignore list
- Allows: from .fixtures.pattern_fixtures import *
- Rationale: Wildcard imports acceptable in pytest conftest.py

All linting checks now pass cleanly for both src/ and tests/.

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

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

Author: MementoRC

pyproject.toml

@@ -211,7 +211,7 @@ ignore = [
 ]
 
 [tool.ruff.lint.per-file-ignores]
-"tests/**/*" = ["F401", "F811"]
+"tests/**/*" = ["F401", "F811", "F403"]
 
 [tool.mypy]
 python_version = "3.10"