fix: keep resetStuckProcessingRows private, restore test wrapper

The test wrapper forwards the in-memory outDb as the writable handle,
avoiding the filesystem reopen that fails in CI. The function stays
private — the optional writableOutDb param is an internal detail, not
a public API.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/host-sweep.test.ts

@@ -7,7 +7,12 @@ import Database from 'better-sqlite3';
 import { describe, expect, it } from 'vitest';
 
 import { deleteOrphanProcessingClaims, getProcessingClaims } from './db/session-db.js';
-import { ABSOLUTE_CEILING_MS, CLAIM_STUCK_MS, resetStuckProcessingRows, decideStuckAction } from './host-sweep.js';
+import {
+  ABSOLUTE_CEILING_MS,
+  CLAIM_STUCK_MS,
+  _resetStuckProcessingRowsForTesting,
+  decideStuckAction,
+} from './host-sweep.js';
 import type { Session } from './types.js';
 
 const BASE = Date.parse('2026-04-20T12:00:00.000Z');
@@ -248,7 +253,7 @@ describe('resetStuckProcessingRows — orphan claim cleanup', () => {
     // Sanity: the orphan claim is what would trip claim-stuck.
     expect(getProcessingClaims(outDb)).toHaveLength(1);
 
-    resetStuckProcessingRows(inDb, outDb, fakeSession(), 'absolute-ceiling', outDb);
+    _resetStuckProcessingRowsForTesting(inDb, outDb, fakeSession(), 'absolute-ceiling');
 
     // Regression assertion: orphan claim is gone — next sweep tick will see
     // an empty claims list and not kill the freshly respawned container.
@@ -280,7 +285,7 @@ describe('resetStuckProcessingRows — orphan claim cleanup', () => {
       .run(claimedAt, future);
     outDb.prepare("INSERT INTO processing_ack VALUES ('m-2', 'processing', ?)").run(claimedAt);
 
-    resetStuckProcessingRows(inDb, outDb, fakeSession(), 'claim-stuck', outDb);
+    _resetStuckProcessingRowsForTesting(inDb, outDb, fakeSession(), 'claim-stuck');
 
     expect(getProcessingClaims(outDb)).toEqual([]);
     const row = inDb.prepare('SELECT tries FROM messages_in WHERE id = ?').get('m-2') as { tries: number };

src/host-sweep.ts

@@ -250,23 +250,16 @@ function enforceRunningContainerSla(
   resetStuckProcessingRows(inDb, outDb, session, 'claim-stuck');
 }
 
-/**
- * Reset retries on inbound rows the container claimed but never acked, and
- * delete the orphan `processing_ack` rows so the next sweep tick doesn't
- * see them.
- *
- * Safe to call only when the container that owned `outbound.db` is dead —
- * production callers invoke this either in the `!alive` branch or right
- * after `killContainer`. Without that guarantee, the orphan-claim delete
- * would race the container's own writer.
- *
- * `writableOutDb` is the same handle outbound writes go through. When
- * omitted (typical production path) the function reopens `outbound.db`
- * read-write by session path for the delete and closes that handle on
- * exit. Callers that already hold a writable handle — including tests
- * using in-memory DBs — can pass it in to skip the reopen.
- */
-export function resetStuckProcessingRows(
+export function _resetStuckProcessingRowsForTesting(
+  inDb: Database.Database,
+  outDb: Database.Database,
+  session: Session,
+  reason: string,
+): void {
+  resetStuckProcessingRows(inDb, outDb, session, reason, outDb);
+}
+
+function resetStuckProcessingRows(
   inDb: Database.Database,
   outDb: Database.Database,
   session: Session,