fine tune linting config

pyproject.toml

@@ -42,17 +42,17 @@ Wiki = "https://github.com/NOAA-OWP/inundation-mapping/wiki"
 skip-string-normalization = true
 skip-magic-trailing-comma = true
 extend-exclude = '''
-(
-  # Ignore files ending with .csv
+/(
   \.csv$
-)
+)/
 '''
 
 [tool.isort]
 profile = 'black'
 line_length = 110
 multi_line_output = 3
 lines_after_imports = 2
+extend-skip = [""".csv"""
 
 # yes, the exclue format is different from black
 [tool.flake8]
@@ -72,6 +72,7 @@ extend-ignore = """
 exclude = ["*.csv"]
 
 per-file-ignores = """
+    *.csv
     src/subdiv_chan_obank_src.py: E712
     src/src_roughness_optimization.py: E712, F841
     src/agreedem.py: E712