Skip SRF sources with slip_sum=0 and fix sfileoutput

[houjun]

• Skip SRF sources with slip_sum=0 and print out the skipped messages
• Write out "Coarsest horizontal grid spacing" for sfile output
• Removed unnecessary H5Gflush that may cause issues in some systems
• Fix NumPy int issue in pytest

[Copilot]

Pull request overview

Updates rupture-source ingestion to detect near-zero slip-velocity integrals (and report them), improves Sfile HDF5 metadata, and removes an HDF5 group flush that can cause platform issues.

Changes:

• Add detection/logging for SRF rupture points with ~zero dt*sum(slip_vel) and report totals skipped.
• Add "Coarsest horizontal grid spacing" attribute to Sfile HDF5 header output.
• Disable H5Gflush(grp) in TimeSeries HDF5 writing.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/TimeSeries.C	Comments out H5Gflush(grp) after final write.
src/SfileOutput.C	Writes new HDF5 scalar attribute for coarsest horizontal grid spacing.
src/readhdf5.C	Adds zero-slip-integral detection, warning prints, and summary counter for HDF5 rupture input.
src/parseInputFile.C	Adds equivalent zero-slip-integral detection, warning prints, and summary counter for text SRF rupture input.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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