leonarski_fandClaude Opus 5 164f15c903 geom_refinement: stop committing refinements that did not converge
Four of the seven ceres::Solve calls in image_analysis obtained a
Solver::Summary and never looked at it, so a solve that failed numerically
had its parameters written back and was reported as success.
StillsPartialityRefine and both PostRefine solves already gated on
IsSolutionUsable(); this brings the rest to the same contract.

IsSolutionUsable() is the right test rather than checking for CONVERGENCE:
it accepts a solve that ran out of iterations or wall-clock time but still
descended, which is exactly what the real-time callers depend on when they
set max_solver_time instead of max_num_iterations. Only FAILURE and
USER_FAILURE are rejected.

XtalOptimizer checks before the write-back, so a failed refinement now
leaves the caller's geom and latt untouched instead of half-updated.
GeometryRefiner folds it into result.ok, which previously reported success
from spot and frame counts alone. RingOptimizer returns a geometry by
value that both callers assign straight back over their input, so it hands
back the unchanged reference rather than a diverged beam centre.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Jungfraujoch

Application to receive data from the PSI JUNGFRAU and EIGER detectors.

All documentation is now placed in docs/ subdirectory and for the current version hosted on Jungfraujoch Read The Docs page.

S
Description
Jungfraujoch Data Acquisition System
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