Estimate Photo Quality Multi-node Network Processing

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Now Estimate Image Quality function do not spread tasks to multiple nodes, it just runs on the one node, which is not efficient.

[rexsham]

We have tons of photos that need to Estimate Photo Quality.
With the latest version, Metashape is still processing Analyze Photos operations with Single node even when we are using Network Mode.
This is very inefficient as this task can easily be sent to multiple nodes for parallel processing.
This is one of the major bottle necks of Metashape network mode.