Chore: add iq blobs with precommit compliant

[cjwu-qm]

Summary

This PR focuses solely on pre-commit (pylint) compliance for the IQ blobs calibration files.

• No functional or behavioral changes
• Docstrings updated to match the IQ blob readout discrimination context
• Minor pylint refactors (import grouping, dict literals, bool conversion)
• Goal: ensure clean pre-commit passes

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File-by-file summary of changes (non-functional only)

qualibration_graphs/superconducting/calibration_utils/iq_blobs/analysis.py

• Added module and missing function docstrings aligned with IQ blob readout calibration.
• Updated the fit_raw_data docstring to describe thresholds/fidelity outputs.
• Replaced dict(...) coordinate construction with dict literals for xarray assigns.
• Replaced __bool__() with bool() for success flags.

qualibration_graphs/superconducting/calibration_utils/iq_blobs/__init__.py

• Added module docstring.

qualibration_graphs/superconducting/calibration_utils/iq_blobs/parameters.py

• Added module docstring and class docstrings for parameter containers.

qualibration_graphs/superconducting/calibration_utils/iq_blobs/plotting.py

• Added module docstring.
• Updated plotting docstrings to describe IQ blobs, histograms, and confusion matrices with thresholds.

qualibration_graphs/superconducting/calibrations/1Q_calibrations/07_iq_blobs.py

• Added module docstring and docstring for save_results.
• Reordered imports to standard/third-party/local grouping and grouped calibration_utils imports.