Specify exception types in bare except clauses

[Copilot]

Addressed review feedback requesting specific exception types instead of bare except: clauses in exptool/analysis/pattern.py.

Changes:

• Line 302: except (FileNotFoundError, IOError, ValueError): - catches file reading/parsing errors when loading bar files
• Line 562: except IndexError: - handles missing third column in data files
• Line 662: except TypeError: - handles scalar vs array input for time parameter

Before:

try:
    indx_barpos = np.zeros([len(time)])
    for indx, timeval in enumerate(time):
        # ...
except:  # Unclear what exceptions are expected
    # Handle scalar time value

After:

try:
    indx_barpos = np.zeros([len(time)])
    for indx, timeval in enumerate(time):
        # ...
except TypeError:  # Explicitly handle scalar input
    # Handle scalar time value

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[michael-petersen]

I need to get better about this in general!