Improve analyzer result querying performance

[jkppr]

The analyzer results are currently requested per timeline when a sketch is loaded. This results in some scaling issues when working with a sketch that has many timelines.

This PR improves the loading performance by adding a new API endpoint that returns only the latest analyzer session for each timeline and analyzer on a given sketch.

• Adding a LatestAnalyzerSketchResource API endpoint.
• Load analyzer results via the new API endpoint
• Fixing a small front-end bug