Gigapixel Image Pipeline Rebuild (.NET → Python/libvips)

Drone-inspection imagery pipeline: a legacy .NET worker re-implemented as Python 3.12 services on AWS (SQS, Lambda, ECS Fargate, S3) using OpenCV and libvips, verified against the legacy output. Measured on real inspection data: 16–20× faster tile generation on the same machine, ~10× faster per blade on AWS (17–31 s vs 281–737 s), ~10× less CPU time and task memory down from 30 GB to 8 GB. 800+ automated tests.