ci: pin Node 24, test every package, fix data-lit-todo id-shape assumption

[krisnye]

Description

Post-merge cleanup for the persistence/sharing quadrant refactor (#158). That PR
merged green even though the data-lit-todo conformance suite was red, because
CI had two gaps. This PR fixes the cause of the failures and the CI blind
spot that let them through. No package version bump.

1. CI now tests every package (was: samples only built)

The downstream test step ran unit tests for only six packages and merely
built the private sample apps (data-lit-todo, data-lit-tictactoe, …). A
broken sample unit test could therefore merge green. The step now runs test
in every workspace package except the core (already covered by the data job)
and data-persistence (whose test pulls in Playwright — kept on its
test:node project). pnpm skips packages that declare no test script.

2. Pin Node >= 24

Set.prototype.isSupersetOf (used on the ecs readEntity path) is Node 22+,
and several suites depend on it, but nothing pinned the runtime. Pinned Node
>=24 in root engines, added/updated .nvmrc and .node-version to 24,
and bumped both CI jobs from Node 22 to 24.

3. Fix data-lit-todo conformance id-shape assumption

The conformance harness assumed the ecs entity id equalled the spec's domain
id (1..N in display order). That identity held only under the old
sign-based id scheme; the quadrant encoding gives document entities stride-4
ids (0, 4, 8, …), so every id-addressed case broke.

Made the harness id-shape-agnostic rather than re-coupling it to the new
encoding or adding a domain-id component:

• fromState returns the seeded entities in display order; the runner maps
  spec id → entity positionally and passes a resolve into each apply, so
  id-addressed transactions (delete / toggle / drag) target the right entity.
• The projection halves compare with expectStateMatchesIgnoringIds, which
  canonicalises todo ids before comparison — behaviour is checked on the
  visible fields, never on the id value. The pure-spec half stays id-strict
  (the spec fully owns its domain ids).

The app model is unchanged; this touches test-only conformance code.

Verification

On Node 24, full CI-equivalent suite is green:

• @adobe/data: typecheck + lint + test:ci — 2921 tests pass.
• All downstream packages test (incl. every sample app) pass; data-lit-todo
  79/79.
• @adobe/data-persistence test:node — 139 pass.

Related PRs

• Follows Persistence×sharing quadrant + ECS relocation signal (snapshot v2, breaking) #158 (persistence/sharing quadrant refactor).

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