Enforce coordinate convention in capture manifests

CAPTURE_MANIFEST_SCHEMA.md

@@ -47,4 +47,7 @@ rotations, and image files when `--check-files` is used. Add an optional
 is present. A view may also include an optional `depth` path and `depth_sha256`
 hash for paired depth ground truth or prediction provenance; these are checked
 with `--check-files`. Keep the held-out view out of reconstruction input; it is
-evaluation evidence, not another input.
+evaluation evidence, not another input. If `coordinate_convention` is present,
+it must be `right-handed; extrinsics are world-to-camera`; this prevents a
+camera-to-world or left-handed matrix from being silently evaluated as COLMAP
+output.