Both PyPI onnxruntime flavors unpack into the same site-packages directory, so a bundle carrying the CPU build (transcription, via faster-whisper) overwrote the GPU build's native libraries during install while the stale onnxruntime_gpu dist-info kept claiming otherwise. Every ONNX-backed tool then silently ran on CPU.
The installer now reconciles the flavor before the venv merge and the GPU build always wins, in both install orders; reinstalling any GPU bundle repairs a previously clobbered venv. gpu.py's warning now says exactly that. Build-side, build-bundle.sh gains the same reconcile and verify-bundle-compatibility.sh layers bundles through the real installer merge and asserts a single flavor.
Verified live on an RTX 4070 against the published bundles: reproduced the clobber with the stock installer, then confirmed both the prevention and repair paths with the patched one.
Fixes#490
