Port Wire Reconstructions

[Linked-Liszt]

In-process wire-scan reconstruction

Adds a native reconstruction kernel to liblaue.so and a Python Reconstructor
that reproduces reconstructN_cpu bit for bit, with reconstruct_points for
spawn-based batches. The executable path (reconstruct()) is unchanged in
scope and remains the cross-check.

• Reconstructor / reconstruct_array: stripe pipeline with overlapped HDF5
  I/O, any numeric input dtype, per-depth HDF5 output and summary file
  matching the executable's conventions.
• reconstruct_points: one reconstructor per worker process; per-point
  failures return success=False instead of aborting the batch.
• Geometry.wire / WireGeometry; ReconstructionError; ImageGeometry,
  StripeTiming on the result.
• liblaue.so now links GSL statically with symbols hidden and no longer
  loads the environment's OpenBLAS.
• -n <tag> normalization now takes effect (previously a no-op).
• Zero-angle wire rotation uses the identity instead of producing NaN.
• Subprocess wrappers default OPENBLAS_NUM_THREADS=1.

Disclosure: Planning assistance and auditing with Fable 5.1; Implementation with GPT 5.6 sol.