Temporal filtering parameters (startTime/endTime) not exposed in /query endpoint

[netbja]

Description

The HSG query function in memory/hsg.ts supports temporal filtering via startTime and endTime parameters, but the /query endpoint in server/routes/vercel.ts doesn't pass these parameters to hsg_query().

This means users cannot filter memories by creation date via the REST API, even though the core functionality exists.

Current behavior

// vercel.ts line ~14
const matches = await hsg_query(query, k, { user_id });

The startTime and endTime from the request body are ignored.

Expected behavior

The endpoint should extract and pass temporal parameters:

const startTime: number | undefined = b.startTime ? Number(b.startTime) : undefined;
const endTime: number | undefined = b.endTime ? Number(b.endTime) : undefined;
const matches = await hsg_query(query, k, { user_id, startTime, endTime });

Steps to reproduce

1. Store a memory
2. Query with startTime set to a future timestamp:

   curl -X POST http://localhost:8090/query \
     -H "Content-Type: application/json" \
     -d '{"query": "test", "startTime": 9999999999999}'

3. Expected: 0 results (no memories created after that timestamp)
4. Actual: Returns all matching memories (filter ignored)

Suggested fix

In backend/src/server/routes/vercel.ts, add extraction of startTime/endTime and pass them to hsg_query().

The same fix should be applied to /memory/query in memory.ts for consistency.

Version

v1.2.3

[netbja]

Note: I discovered that the main branch has been refactored to v1.3.0 (SDK-only architecture) and no longer contains the server code.

The bug and fix apply to the v1.2.x server (backend/src/server/routes/vercel.ts).

If there's a maintenance branch for v1.2.x, I can submit a PR there. Otherwise, this issue documents the fix for anyone running the v1.2.x server.

Workaround for v1.2.3 users: Apply this patch to vercel.ts:

 const k: number = Math.max(1, Math.min(32, Number(b.k) || 8));
+const startTime: number | undefined = b.startTime ? Number(b.startTime) : undefined;
+const endTime: number | undefined = b.endTime ? Number(b.endTime) : undefined;
 if (!query) return res.status(400).json({ err: "query" });

-const matches = await hsg_query(query, k, { user_id });
+const matches = await hsg_query(query, k, { user_id, startTime, endTime });