Merge PR #801 altitude plausibility filter from Lob26

Preserve Pedro Lobato’s original commits. Move his credited release note into a changelog fragment when resolving the current-main conflict.

changelog.d/801-local-adsb-altitude-filter.md

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+- Local ADS-B no longer draws an aircraft at an altitude it cannot have
+  reached. A corrupt frame can still pass CRC, and one reached the globe as a
+  DC-9 at 108,800 ft. Each altitude report must now be reachable from the last
+  accepted one at a plausible vertical rate, whether it came from the browser
+  SDR or a decoder feed. A refused report keeps the previous altitude for the
+  marker, the card and the 3D model alike. Three refusals in a row start over
+  from the new value, and a surface report is never compared with the last
+  airborne altitude. The layer stats count refusals as `rejectedAltitudes` (Pedro Lobato, #801).