Add Repository.queryBatched with structural query-key batching and projection-safe decoding

[Copilot]

This change adds a full batched-query path for repository reads, including structural query-key comparison so equivalent filters (including array operands like in) coalesce reliably. It also keeps decoding behavior projection-safe by resolving each projection independently from a shared fetched row set.

• Problem addressed

  • Introduces a concrete end-to-end implementation of batched repository querying.
  • Ensures batch grouping is structural (not reference/order fragile), including filters with array values.

• Repository API surface

  • Added queryBatched to Repository (queryBatched: this["query"]) so it mirrors existing query typing/usage.

• Batching internals

  • Added grouped request-based batching in repository internals.
  • Implemented structural canonicalization for batch keys over:
    • mode / result type
    • filter / order
    • limit / skip
    • fixed (non-mergeable) select items
  • Merges plain projection select fields across compatible requests in the same batch.

• Decode/projection behavior

  • Executes one shared store filter call per batch group.
  • Applies per-request decode/projection resolution on the shared row set to avoid unsafe cross-projection transform assumptions.

• Coverage

  • Added test coverage for concurrent queryBatched calls using in filters with array values and different projections.
  • Added a changeset for @effect-app/infra.

const cartIds = ["cart-1", "cart-2"]

const [a, b] = yield* Effect.all([
  repo.queryBatched(
    where("cartId", "in", cartIds),
    project(S.Struct({ id: S.String, cartId: S.String }))
  ),
  repo.queryBatched(
    where("cartId", "in", cartIds),
    project(S.Struct({ id: S.String, qty: S.Number }))
  )
])

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commit: 20cce98