[Draft] ANN clustering: Add unlimited zoom handling

[igoroctaviano]

• When zoom is unlimited, compare the current resolution to the resolution at the original max zoom level (or the highest available if maxZoom exceeds the number of resolutions). This aligns with the limited-zoom behavior.

The fix:
Uses the resolution value at the maxZoom index (or the last resolution if maxZoom is too high)
Compares currentResolution <= targetResolution (smaller resolution = higher zoom in OpenLayers)
This should prevent detecting high resolution too early. The console will show the target resolution being used for comparison, which should help verify the behavior.

• Ref: Bulk annotations always cluster slim#330

[igoroctaviano]

@fedorov, please test this before merging!

[fedorov]

@igoroctaviano as discussed in Slack, I would appreciate it if you could create a separate PR disabling overzooming so I can test both approaches.