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Allow users to define an implicit interpolator, which is used when a TLF needs to be resampled. The QO can use the II (if present) when necessary to improve query...
Also confirm that scanned TLFs exist in the catalog
`Scan(x).Store(x)` should only update metadata, ensure that the optimized plan doesn't create a new stream on disk.
Frame data should carry a pixel format, and runtimes should ensure that they don't encounter an unexpected format.
Currently we repeatedly tee in most every physical rule, but that's silly. Should split this into a separate rule.
Can replace `ScanSingleFile`->`CPUDecode` with a single physical operator that uses Ffmpeg to directly read the file.