chore(changeset): spec minor for SemanticMigration.conversionIds

Claude-Session: https://claude.ai/code/session_01Sfe5YjBLwB9J3y8fvm2xq1
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

.changeset/20697-semantic-migration-conversion-ids.md

@@ -0,0 +1,19 @@
+---
+'@objectstack/spec': minor
+---
+
+feat(spec): a semantic migration names the D2 conversions whose applied edits it judges
+
+Clause-②: yes (widening)
+
+`SemanticMigration`, the ADR-0087 D3 entry type exported by `@objectstack/spec`,
+gains one optional member, `conversionIds?: readonly string[]`. It lists the ids
+of the D2 conversions whose applied edits the entry judges. Each id is the same
+`conversionId` that the conversion's `MigrationApplication` rows carry, so a
+printer of an `applyMetaMigrations` result can show the entry beside those edits
+for review. The chain copies the field onto the entry's `MigrationTodo`, so
+`objectstack migrate meta --json` shows it on that todo. Nothing is removed or
+renamed, and every entry is still reported as a todo of its hop.
+
+One link ships: `flow-decision-edge-branching-first-match` judges the
+`mode: 'inclusive'` edits that `flow-decision-mode-inclusive-explicit` writes.