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

basic/moon_physical.go

@@ -27,14 +27,15 @@ type MoonPhysicalInfo struct {
 	PositionAngle float64
 }
 
-// MoonPhysical 月球物理观测参数 / physical observing parameters of the Moon.
-func MoonPhysical(jde float64) MoonPhysicalInfo {
-	return MoonPhysicalN(jde, -1)
+// MoonPhysicalWithInstance 用指定星历实例求值；inst 为 nil 时用进程当前模型 / evaluation with an explicit instance; nil uses the process model.
+func MoonPhysicalWithInstance(jde float64, inst *Instance) MoonPhysicalInfo {
+	return MoonPhysicalNWithInstance(jde, -1, inst)
 }
 
-// MoonPhysicalN 月球物理观测参数（截断版） / truncated physical observing parameters of the Moon.
-func MoonPhysicalN(jde float64, n int) MoonPhysicalInfo {
-	return moonPhysicalNFromCoordinates(jde, n, HMoonApparentLoN(jde, n), HMoonTrueBoN(jde, n), HMoonTrueRaN(jde, n))
+// MoonPhysicalNWithInstance 用指定星历实例求值；inst 为 nil 时用进程当前模型 / evaluation with an explicit instance; nil uses the process model.
+func MoonPhysicalNWithInstance(jde float64, n int, inst *Instance) MoonPhysicalInfo {
+	lo, bo := moonApparentLoBoN(jde, n, inst)
+	return moonPhysicalNFromCoordinates(jde, n, lo, bo, HMoonTrueRaNWithInstance(jde, n, inst))
 }
 
 // MoonTopocentricPhysical 月球站心物理观测参数 / topocentric physical observing parameters of the Moon.
@@ -42,9 +43,9 @@ func MoonTopocentricPhysical(jde, observerLon, observerLat, height float64) Moon
 	return MoonTopocentricPhysicalN(jde, observerLon, observerLat, height, -1)
 }
 
-// MoonTopocentricPhysicalN 月球站心物理观测参数（截断版） / truncated topocentric physical observing parameters of the Moon.
-func MoonTopocentricPhysicalN(jde, observerLon, observerLat, height float64, n int) MoonPhysicalInfo {
-	lambda, beta, alpha := moonTopocentricPhysicalCoordinatesN(jde, observerLon, observerLat, height, n)
+// MoonTopocentricPhysicalNWithInstance 用指定星历实例求值；inst 为 nil 时用进程当前模型 / evaluation with an explicit instance; nil uses the process model.
+func MoonTopocentricPhysicalNWithInstance(jde, observerLon, observerLat, height float64, n int, inst *Instance) MoonPhysicalInfo {
+	lambda, beta, alpha := moonTopocentricPhysicalCoordinatesN(jde, observerLon, observerLat, height, n, inst)
 	return moonPhysicalNFromCoordinates(jde, n, lambda, beta, alpha)
 }
 
@@ -91,10 +92,12 @@ func moonPhysicalNFromCoordinates(jde float64, n int, lambda, beta, alpha float6
 	}
 }
 
-func moonTopocentricPhysicalCoordinatesN(jde, observerLon, observerLat, height float64, n int) (lambda, beta, alpha float64) {
-	geocentricRA := HMoonTrueRaN(jde, n)
-	geocentricDec := HMoonTrueDecN(jde, n)
-	distanceAU := HMoonAwayN(jde, n) / moonPhysicalAstronomicalUnitKM
+func moonTopocentricPhysicalCoordinatesN(jde, observerLon, observerLat, height float64, n int, instances ...*Instance) (lambda, beta, alpha float64) {
+	inst := instanceValue(instances)
+
+	geocentricRA := HMoonTrueRaNWithInstance(jde, n, inst)
+	geocentricDec := HMoonTrueDecNWithInstance(jde, n, inst)
+	distanceAU := HMoonAwayNWithInstance(jde, n, inst) / moonPhysicalAstronomicalUnitKM
 	utcJD := TT2UTC(jde)
 
 	var topocentricDec float64