fix(objectql): type the preview's header read options instead of erasing them

check:query-options-erasure counts an any-cast on engine read options; the
preview's caller read of the header now carries EngineQueryOptions, and the
test's reads and writes pass their context without a cast.

Claude-Session: https://claude.ai/code/session_01Bw3y2DWhT9RPnrmDsNqEVG
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

packages/objectql/src/engine.ts

@@ -8787,7 +8787,7 @@ export class ObjectQL implements IObjectQLEngine {
         const rows = await this.find(rel.master, {
           where: { id: { $in: [...ids] } },
           context,
-        } as any) as Array<Record<string, unknown>>;
+        } as EngineQueryOptions) as Array<Record<string, unknown>>;
         for (const row of Array.isArray(rows) ? rows : []) {
           if (row?.id != null && ids.has(String(row.id))) served.set(String(row.id), row);
         }

packages/objectql/src/validate-preview-parent.test.ts

@@ -340,7 +340,7 @@ describe('#22474 — the preview binds the master-detail header the write binds'
       for (const status of ['draft', 'sent']) {
         setHeaderStatus(status);
         // Precondition: the read door serves the header to erin, with `status` restricted.
-        const served = await engine.findOne(HEADER, { where: { id: 'h_x' }, context: erin } as any);
+        const served = await engine.findOne(HEADER, { where: { id: 'h_x' }, context: erin });
         expect(served).toMatchObject({ id: 'h_x' });
         expect(served?.status === status).toBe(false);
         verdicts.push(await preview(engine, LINE, { name: 'l', invoice: 'h_x', quantity: 1 }, 'insert', erin));
@@ -361,11 +361,11 @@ describe('#22474 — the preview binds the master-detail header the write binds'
         setHeaderStatus(status);
         const row = { name: 'l', invoice: 'h_x', quantity: 1 };
         expect(await preview(engine, LINE, row, 'insert', alice)).toEqual(expected);
-        expect(await write(() => engine.insert(LINE, row, { context: alice } as any))).toEqual(expected);
+        expect(await write(() => engine.insert(LINE, row, { context: alice }))).toEqual(expected);
         storeFor(LINE).set('l_x', { id: 'l_x', name: 'l', invoice: 'h_x', description: 'seat', quantity: 1 });
         const patch = { description: null, id: 'l_x' };
         expect(await preview(engine, LINE, patch, 'update', alice)).toEqual(expected);
-        expect(await write(() => engine.update(LINE, patch, { context: alice } as any))).toEqual(expected);
+        expect(await write(() => engine.update(LINE, patch, { context: alice }))).toEqual(expected);
       }
     });
   });