Add a reusable video alignment module for offline multiview workflows. The helper scans per-frame timestamps, builds nearest-timestamp bundle matches under a configurable skew threshold, and rewrites synchronized per-camera videos for downstream detection and tracking runs.
The detection package now exports the alignment primitives, and a test-support CLI is included so dataset-specific experiments can generate aligned clips without expanding the public application surface.
Regression tests cover both bundle matching and frame selection during rewritten video generation.
