Patch/raster results layer

[AlexeyTrekin]

We want to allow new API feature - raster tiles streaming.
In case "show as tiles" this will be a new and preferrable type of result preview, to disallow free usage of vector results.
Older processings will have only vector tiles, so we do not remove this possibility, but newer ones will lack vector tiles (after release of thiss feature at frontend)

In case "download as file" nothing will change, but the api will be hidden behind the paywall (later)

[Copilot]

Pull Request Overview

This PR adds support for handling and displaying raster result layers in tile form, while also cleaning up an outdated style case.

• Removes a deprecated building + road style branch in styles.py.
• Introduces load_result_tiles, with separate raster and vector tile loading methods.
• Extends the Processing entity model to include an optional result_raster_layer.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
mapflow/styles.py	Removed obsolete building+road style fallback.
mapflow/functional/layer_utils.py	Added load_result_tiles entry point, with raster/vector methods.
mapflow/entity/processing.py	Added result_raster_layer attribute and parsing in Processing.

Comments suppressed due to low confidence (1)

mapflow/styles.py:46

• Removing this branch means there is no fallback style for features containing both 'building' and 'road'; confirm this change is intended or add a new style mapping if needed.

        name = 'building_heights'

[Copilot]

The load_result_vector_tiles method is incomplete—it only references raster layers. You likely need to generate and request extents for the vector tiles (e.g. using generate_vector_layer and request_layer_extent).

[AlexeyTrekin]

Loading of the vector layer is carried out by callback of request_layer_extent, where it is passed as callback argument. Unfortunately, we did not find better solutions for this in Qt "request-callback/error handler" async approach