fix: remove erroneous *10 multiplier on aircraft altitude values

[silvertakana]

Summary

Fixes #358 - Aircraft altitude values were being multiplied by 10 after they were already in meters, causing planes at typical cruising altitudes (e.g., 39,000ft / ~12,000m) to display as 120,000m (120km).

Root Cause

Both the commercial aviation (OpenSky) and military aviation (ADSB.lol) plugins had an erroneous * 10 multiplier on altitude values that were already in meters:

• wwv-plugin-aviation: altitude: (st.alt || 0) * 10 — st.alt from OpenSky API is already in meters
• wwv-plugin-military-aviation: altitude: altMeters !== null ? altMeters * 10 : 0 — altMeters is the result of feetToMeters(), so it's already in meters

Changes

File	Line	Before	After
wwv-plugin-aviation/src/index.ts	48	`altitude: (st.alt
wwv-plugin-military-aviation/src/index.ts	58	altitude: altMeters !== null ? altMeters * 10 : 0	altitude: altMeters !== null ? altMeters : 0

Closes #358