vvzvlad 4b34f4d30a feat(sync): resolve §11 idempotency via canonical comparison + corpus harness ...

Close Задача №0 (SPEC §11) with the spec-sanctioned option (b): compare a
canonicalized ProseMirror form instead of raw bytes.

- canonicalize.ts: canonicalizeContent/docsCanonicallyEqual — strip node attrs.id,
  drop null/undefined attrs, and drop attrs equal to their type's known non-null
  schema default (KNOWN_DEFAULTS: link target/rel, comment.resolved, orderedList.start,
  diagram/media align) so "absent" ≡ "default"; comment anchors + meaningful attrs kept
- roundtrip.ts: assert markdown byte-stability AND canonical stability; add --corpus
  mode and mutually-exclusive-flag warning
- synthetic corpus (headings, marks, lists, table, callout, code w/ trailing \n,
  diagrams, textStyle/mention) + canonicalize/corpus tests (558 green)
- known converter asymmetries (block image after paragraph; embed width/height
  coercion) converge to a fixpoint after one export->import pass -> handled by
  normalize-on-write at vault-write time; isolated under it.fails
- SPEC §11: record the resolution and normalize-on-write strategy

2026-06-16 23:23:32 +03:00

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