Coalesce ruff config into pyproject.yoml (#90)

Author: dhalperi

pyproject.toml

@@ -124,3 +124,36 @@ exclude_lines = [
     "raise AssertionError",
     "raise NotImplementedError",
 ]
+
+[tool.ruff]
+# Same as Black line length
+line-length = 88
+
+# Python version compatibility
+target-version = "py310"
+
+[tool.ruff.lint]
+# Enable rules that replace the tools we're removing:
+# - F: Pyflakes (basic linting)
+# - E, W: pycodestyle errors and warnings
+# - I: isort (import sorting)
+# - UP: pyupgrade (modern Python idioms, but be selective)
+select = ["F", "E", "W", "I", "UP031", "UP008"]
+
+# Ignore some rules that might be too strict for existing code
+ignore = [
+    "E501",  # Line too long (handled by formatter)
+    "E741",  # Ambiguous variable name (too restrictive for this codebase)
+    "E722",  # Do not use bare except (existing code pattern)
+]
+
+[tool.ruff.lint.isort]
+# Match the existing isort configuration (black-compatible)
+force-single-line = false
+combine-as-imports = true
+known-first-party = ["lab_validation", "lab_tests"]
+
+[tool.ruff.format]
+# Use Black-compatible formatting
+quote-style = "double"
+indent-style = "space"