* fix(installer): surface pywhispercpp CUDA fallback diagnostics
* fix(installer): add patchelf auto-remediation and behavioral tests
- Add patchelf auto-remediation for bundled libcuda linkage issue
- Add ARM64 CUDA toolkit path support (aarch64-linux, sbsa-linux)
- Fix nvcc symlink resolution with readlink -f
- Add --verbose flag to CPU pywhispercpp pip install
- Add behavioral tests for CUDA diagnostic functions
- Add string-presence test for patchelf remediation
Fixes#450
* fix(installer): replace ★ with * to fix box border alignment
The ★ character (U+2605) renders as 2 columns wide in most terminals,
but the box padding assumes 1 column. This pushes the right border │
one column past the intended box edge, making it appear cut off.
Replacing with ASCII * (always 1 column) fixes the alignment.
