Properly log validation errors when parsing VideoInfo

[daniil-berg]

Currently the get_ffprobe_info function simply replaces a ValidationError with an FFProbeError that contains the stderr string from the sub-process.

videbo/src/videbo/video/analyze.py

Lines 132 to 142 in e7b53e0

	try:
	stdout, stderr = await wait_for(proc.communicate(), timeout_seconds)
	except AsyncioTimeoutError:
	proc.kill()
	raise FFProbeError(timeout=True) from None
	try:
	return VideoInfo.parse_raw(stdout.decode())
	except ValidationError:
	# TODO: Passing `stderr` and discarding the `ValidationError` is wrong;
	# ensure validation problems are properly logged!
	raise FFProbeError(stderr=stderr.decode()) from None

There should probably be two distinct error paths: One handling a non-empty stderr and the other handling a validation error when parsing stdout.