Module diff 

Payload diff (issue #63): what changed between two consecutive values of one key.

For a keyspace-v2 state key this is the question — state is a LWW document, so “what moved” is what a reader actually wants, and re-reading two pretty-printed payloads side by side to find it is the thing explorers are supposed to save you from.

Two levels, and which one ran is never hidden:

• diff over two structural values (crate::model::decode::structural_value) — named fields, added/removed/changed;
• byte_diff when either side has no structural form (plain text, a protobuf frame, an opaque blob) — the honest fallback, reporting how much of the two byte strings is common rather than pretending to name fields.

Deliberately no notion of Put vs Delete: a tombstone is not a value and diffing it against one would be a category error. SampleView::kind is exact, and the frontend words the retirement.

Re-exports

pub use crate::report::ByteDiff;

pub use crate::report::Change;

pub use crate::report::ValueDiff;

Functions

byte_diff

Compare two payloads as bytes — the fallback when no structural form exists.

diff

Structurally compare two values, listing at most max_changes differences and counting the rest.