It had drifted out of agreement with itself. The manifest section still said
`image` is std/core/v1/UInt8 and depth and camera_info are std/core/v1/Float32,
four lines above a table correctly saying both are std/media/v1/Image, and the
worked example for a producer showed the flat-buffer form the node moved away
from. Someone following it would have written a producer that fails validate.
It was also close to twice the length of the one next door, mostly rationale:
why a dataflow carries no strict_types, how a producer migrates, what a git:
node needs and why. That belongs in the file it explains or in the commit that
made the decision, not in front of someone trying to wire a node.
1007 words, from 1749. Every encoding, environment variable and CLI flag in it
was checked against the code.
