refactor(core): extract shared dedup helpers

src/memory/batch-embedding-common.ts

@@ -1,6 +1,12 @@
 export { extractBatchErrorMessage, formatUnavailableBatchError } from "./batch-error-utils.js";
 export { postJsonWithRetry } from "./batch-http.js";
 export { applyEmbeddingBatchOutputLine } from "./batch-output.js";
+export {
+  resolveBatchCompletionFromStatus,
+  resolveCompletedBatchResult,
+  throwIfBatchTerminalFailure,
+  type BatchCompletionResult,
+} from "./batch-status.js";
 export {
   EMBEDDING_BATCH_ENDPOINT,
   type EmbeddingBatchStatus,