Cap Mongo connection pools and index dailyEvents by groupHash

[Kuchizu]

Set appName, maxPoolSize and maxIdleTimeMS on both Mongo clients
Create {groupHash:1} index on dailyEvents of new projects

[Copilot]

Pull request overview

This PR tightens MongoDB client connection behavior to avoid excessive socket usage and adds an index to improve lookups on dailyEvents by groupHash for newly created projects.

Changes:

• Add MongoDB client options: appName, maxPoolSize, and maxIdleTimeMS for both Hawk and Events clients.
• Create a { groupHash: 1 } index on each new project’s dailyEvents collection.
• Bump package version from 1.5.3 to 1.5.4.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/resolvers/project.js	Adds { groupHash: 1 } index creation for new projects’ dailyEvents:* collections.
src/mongo.ts	Applies appName, pool size cap, and idle socket timeout to MongoDB client connections.
package.json	Version bump to 1.5.4.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.