Fix Dependabot update-uv-graph failure: invalid TOML escape in poe clean task

pyproject.toml

@@ -159,31 +159,31 @@ python -m http.server 3333 --directory ./test-reports/htmlcov
 
 [tool.poe.tasks.clean]
 help = "Remove all files generated by tests, builds, or operating this codebase"
-shell = """
+shell = '''
 rm -rf dist build coverage.xml test-reports sample/ tests/artifacts/
 
-find . \\
-    -type d \\
-    \\( \\
-    -name "*cache*" \\
-    -o -name "*.dist-info" \\
-    -o -name "*.egg-info" \\
-    -o -name "*htmlcov" \\
-    -o -name "*.metaflow" \\
-    -o -name "*.metaflow.s3" \\
-    -o -name "*.mypy_cache" \\
-    -o -name "*.pytest_cache" \\
-    -o -name "*.ruff_cache" \\
-    -o -name "*__pycache__" \\
-    \\) \\
-    -not -path "*env/*" \\
+find . \
+    -type d \
+    \( \
+    -name "*cache*" \
+    -o -name "*.dist-info" \
+    -o -name "*.egg-info" \
+    -o -name "*htmlcov" \
+    -o -name "*.metaflow" \
+    -o -name "*.metaflow.s3" \
+    -o -name "*.mypy_cache" \
+    -o -name "*.pytest_cache" \
+    -o -name "*.ruff_cache" \
+    -o -name "*__pycache__" \
+    \) \
+    -not -path "*env/*" \
     -exec rm -r {} + || true
 
-find . \\
-    -type f \\
-    -name "*.pyc" \\
-    -o -name "*.DS_Store" \\
-    -o -name "*.coverage*" \\
-    -not -path "*env/*" \\
+find . \
+    -type f \
+    -name "*.pyc" \
+    -o -name "*.DS_Store" \
+    -o -name "*.coverage*" \
+    -not -path "*env/*" \
     -exec rm {} +
-"""
+'''