Merge branch 'main' into german/map-render-error-state

changelog.d/1714-fleet-models.md

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+- Draw every 3D model from the project's procedural fleet set: 121 models
+  (about 2 MB, MIT like the code) chosen per vehicle by type and drawn life
+  size, replacing the eight third-party aircraft models. Flights, Military
+  Flights and Local ADS-B pick a model by ICAO type, class and emitter
+  category; Vessels, Transit and Rail now draw models too, under the same 3D
+  toggle and distances, a ship at its AIS length and beam and a tram, bus or
+  train in its mode or category colour. The whole set loads once when a layer
+  starts (samehkhamis, #1714).

changelog.d/1715-vessel-typical-length.md

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+- Draw a vessel whose feed sends no length at its ship type's typical size, so
+  a cruise ship or container ship no longer shows as its type's smallest model
+  (samehkhamis, #1715).