Lint-PR-375 (#376)

* Lint PR 375
- Fixed invalid escape sequence in `type_engine.py` (was `SyntaxWarning`, will be error in Python 3.16)
- Removed dead code from Snowflake database module

* Ruff
- Configured Ruff to ignore intentional patterns (re-exports in `__init__.py`, star imports in tests)
- Fixed duplicate test method in `test_build_filters.py`
- Fixed duplicate import in `test_references.py`

* Ruff format

Bump version: 7.8.6 → 7.9.0

Bump version: 7.8.5 → 7.8.6

Bump version: 7.8.4 → 7.8.5

Bump version: 7.8.3 → 7.8.4

Bump version: 7.8.2 → 7.8.3

Bump version: 7.8.1 → 7.8.2

Bump version: 7.8.0 → 7.8.1

Bump version: 7.7.8 → 7.8.0

Bump version: 7.7.7 → 7.7.8