Title: Potential Memory Leak in @envelop/response-cache InMemoryCache

[reinaldomendes]

Just a quick heads-up, we discovered a memory leak in the createInMemoryCache function that occurs under heavy eviction pressure.

• package.json

 {
  "name": "@envelop/response-cache",
  "version": "6.3.0",
  }

The purgeResponse function doesn't clean up empty Sets from the entityToResponseIds map, causing it to grow indefinitely with orphaned keys.

The problematic code:

// in-memory-cache.js
for (const entityId of entityIds) {
    entityToResponseIds.get(entityId)?.delete(responseId);
}

Here is our patch, which fixed the leak for us:

// Patched version
for (const entityId of entityIds) {
    const responseIds = entityToResponseIds.get(entityId);
    if (responseIds) {
        responseIds.delete(responseId);
        if (responseIds.size === 0) {
            entityToResponseIds.delete(entityId);
        }
    }
}

Hope this helps! Thanks for all your work on Yoga.