Camera Motion Metadata ('camm') & .INSV High-Rate Gyro/Shutter Extractor (.gcsv Exporter)

Deterministic Google StreetView Camera Motion Metadata ('camm' ISO BMFF track types 0..7 little-endian IEEE-754) & trailing TLV IMU ring-buffer carver + rolling-shutter readout timestamp interpolator engine (.mp4, .insv, .mov) built for Gyroflow, Insta360, Google Street View, Nerfstudio / Postshot — zero-upload ephemeral Wasm RAM execution.