feat: 引入可切换星历模型并扩展天象观测链路

- 新增半解析、旧模型、自定义与多源堆叠星历实例，提供 Context、Instance、SPK 读取及状态与视位置计算
- 统一太阳、月球和行星实例接口，扩展黄经穿越、留、相位、最近角距、偕日可见、任意高度升落、轨道节点及凌日等天象查询
- 完善日月食、月掩与凌日的月缘剖面、有限盘面接触、站心修正、局地可见性、全球路径和地图输出
- 新增 SVG、GeoJSON、KML 天象输出及凌日、月掩和月缘地形相关缓存与几何求解
- 新增恒星星表导入与查询，支持 CSV、Hipparcos、BSC5、Stellarium 等格式及名称、交叉标识、锥面检索和星等过滤
- 补充 IAU 2006、地球定向、折射消光、大气观测、轨道传播及半解析行星/月球数据支持
- 将默认未来民用时标切换为 TimeScaleLeapHour，更新 2027–2400 农历速查表、中文日期解析和时区边界处理
- 增加事件基线、跨模型回归、几何边界、月缘地形和输出契约测试，完善中英文手册、示例资源、NOTICE 与忽略规则

eclipse/solar_local_test.go

@@ -5,6 +5,8 @@ import (
 	"time"
 
 	"b612.me/astro/basic"
+
+	"b612.me/astro/internal/ephemtest"
 )
 
 func TestLocalSolarEclipseOnDateByLocalDay(t *testing.T) {
@@ -284,6 +286,7 @@ func TestLocalSolarEclipseInfoKeepsLocation(t *testing.T) {
 }
 
 func TestLocalSolarEclipseContactPoints(t *testing.T) {
+	values := ephemtest.NewValues(t, "local_solar_contact_points")
 	loc := time.FixedZone("UTC+08", 8*3600)
 	info := ClosestLocalSolarEclipse(
 		time.Date(2024, 4, 8, 12, 0, 0, 0, loc),
@@ -302,10 +305,10 @@ func TestLocalSolarEclipseContactPoints(t *testing.T) {
 	for _, point := range info.ContactPoints {
 		points[point.Label] = point
 	}
-	assertSolarFloatClose(t, "C1.ContactPositionAngle", points["C1"].ContactPositionAngle, 226.219228, 1e-3)
-	assertSolarFloatClose(t, "C2.ContactPositionAngle", points["C2"].ContactPositionAngle, 19.133602, 1e-3)
-	assertSolarFloatClose(t, "C2.MoonCenterPositionAngle", points["C2"].MoonCenterPositionAngle, 199.133602, 1e-3)
-	assertSolarFloatClose(t, "C4.ContactClockwiseAngle", points["C4"].ContactClockwiseAngle, 310.781438, 1e-3)
+	assertSolarFloatClose(t, "C1.ContactPositionAngle", points["C1"].ContactPositionAngle, values.Want("C1.ContactPositionAngle", 226.219228, points["C1"].ContactPositionAngle), 1e-3)
+	assertSolarFloatClose(t, "C2.ContactPositionAngle", points["C2"].ContactPositionAngle, values.Want("C2.ContactPositionAngle", 19.133602, points["C2"].ContactPositionAngle), 1e-3)
+	assertSolarFloatClose(t, "C2.MoonCenterPositionAngle", points["C2"].MoonCenterPositionAngle, values.Want("C2.MoonCenterPositionAngle", 199.133602, points["C2"].MoonCenterPositionAngle), 1e-3)
+	assertSolarFloatClose(t, "C4.ContactClockwiseAngle", points["C4"].ContactClockwiseAngle, values.Want("C4.ContactClockwiseAngle", 310.781438, points["C4"].ContactClockwiseAngle), 1e-3)
 }
 
 func TestLocalSolarEclipseContactPointsFromMergedFrameLabels(t *testing.T) {