fn check_collision_compatibility(
master_flat_rewritten: &Map<String, Value>,
v2_defs: &Map<String, Value>,
) -> Result<()>Expand description
For every definition name present in both master_flat_rewritten and
v2_defs, verifies they’re either identical or on the explicit
known-divergent allowlist. build_combined always prefers v2’s copy on a
collision; this only exists to catch collisions where that’s not safe -
a future codex schema change that makes some other same-named type
genuinely diverge between the two bundles would otherwise have v2 silently
substitute the wrong shape into a master-derived envelope type (several of
which transitively $ref into collision names like AbsolutePathBuf and
RequestId), with no build failure and no warning.