Partial-to-verified sprint: compact notebook line-port improvements

[iahncajigas]

Summary

• execute next-step sprint slice after merging PR Strict line-port sprint: SignalObj parity + snapshots #9
• convert compact notebook topics to strict line-port verified by reducing non-MATLAB overhead lines while preserving assertions/checkpoints
• refresh parity and numeric drift artifacts

Changes

• Updated generator templates for TrialConfigExamples, ConfigCollExamples, CovCollExamples, and nSpikeTrainExamples
• Regenerated affected notebooks
• Updated example output spec minima to match compact templates
• Regenerated parity reports

Validation

• pytest -q
• python tools/parity/check_example_output_spec.py --report parity/function_example_alignment_report.json --spec parity/example_output_spec.yml
• python tools/parity/build_numeric_drift_report.py --fixtures-manifest tests/parity/fixtures/matlab_gold/manifest.yml --thresholds parity/numeric_drift_thresholds.yml --report-out parity/numeric_drift_report.json --fail-on-violation
• python tools/parity/check_functional_parity_progress.py --report parity/function_example_alignment_report.json

Parity impact

• strict line-port status improved from 11 verified / 15 partial / 0 gap to 15 verified / 11 partial / 0 gap