fix: display shard key in collection tooltip

[lte-z]

Fixes #661

Changes

This PR exposes shard key information for sharded collections in the tree view tooltip.

• Extended CollectionItemModel to include optional shardKey field
• Extracted shard key from MongoDB listCollections() response in ClustersClient
• Rendered shard key in CollectionItem tooltip when present
• Added localization entry for "Shard Key"

Behavior

• Sharded collections now display their shard key in tooltip, e.g.:

Database: my-database
Documents: 5.2k
Shard Key: { userId: "hashed" }

• Non-sharded collections are unaffected (no shard key section shown)

Notes

• Handles missing or undefined shard key safely
• Supports both numeric (1) and hashed shard key formats

[lte-z]

@microsoft-github-policy-service agree

[Copilot]

Pull request overview

Exposes sharding metadata in the DocumentDB tree UI by preserving the shard key from listCollections() and rendering it in the collection tooltip.

Changes:

• Extend CollectionItemModel with an optional shardKey property populated from listCollections() results.
• Update CollectionItem tooltip to conditionally display shard key details when present.
• Add localization string for “Shard Key”.

Reviewed changes

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

File	Description
src/tree/documentdb/CollectionItem.ts	Adds shard key section to the collection tooltip.
src/documentdb/ClustersClient.ts	Extracts and stores shard key from listCollections() into the collection model.
l10n/bundle.l10n.json	Adds localized string entry for “Shard Key”.

[tnaum-ms]

@lte-z Thank you for your contribution and for addressing Copilot review. I'll review your PR tomorrow.