Credit the sources the solar system's orbits now come from, in the README and a search comment

Since 48319c3 and 1d42be2 no position comes from Horizons: the planets move on Standish's mean
elements (Table 2a/2b), the moons on JPL SSD's satellite table, Ceres, Eris, Haumea and Makemake
on the Small-Body Database's osculating elements, and every body turns by the IAU's rotational
elements from NAIF's pck00011. bodies.json's orbitSource values say so (9 Standish, 25 satellite
table, 4 SBDB, none Horizons). Horizons gives sizes, spins and the positions the ETL checks
against. The README still credited "Solar-system ephemerides: NASA/JPL Horizons", said the Sun's
bodies came "from JPL Horizons", listed fetchSolarSystem's source as "JPL Horizons / SSD", and had
Horizons reporting every element against the ecliptic, where the moons' are against a Laplace
plane or their planet's equator. The branch had edited the credits paragraph and left that line.
search-ranking.ts called the solar-system bodies "eighteen famous objects"; there are 38.

Documentation only; no behaviour changes.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/app/features/search/search-ranking.ts

@@ -21,7 +21,7 @@ const MATCH_SUBSTRING = 1;
 const NO_MATCH = 0;
 
 /**
- * Order for results that match equally well. Solar-system bodies are eighteen famous objects
+ * Order for results that match equally well. Solar-system bodies are a few dozen named worlds
  * and win ties outright; a star outranks an exoplanet because searching a name like "Proxima"
  * is usually an attempt to reach the system rather than one particular planet in it.
  */