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

moon/phase.go

@@ -7,26 +7,23 @@ import (
 )
 
 // BrightLimbPositionAngle 月亮明亮边缘位置角，单位度 / position angle of the Moon's bright limb in degrees.
-func BrightLimbPositionAngle(date time.Time) float64 {
-	return BrightLimbPositionAngleN(date, -1)
+func (module *Moon) BrightLimbPositionAngle(date time.Time) float64 {
+	return module.BrightLimbPositionAngleN(date, -1)
 }
 
-// BrightLimbPositionAngleN 月亮明亮边缘位置角（截断版），单位度 / truncated position angle of the Moon's bright limb in degrees.
-func BrightLimbPositionAngleN(date time.Time, n int) float64 {
-	return basic.MoonBrightLimbPositionAngleN(observationTT(date), n)
+// BrightLimbPositionAngleN 月亮明亮边缘位置角（n 变体），单位度 / n-parameterised position angle of the Moon's bright limb in degrees.
+func (module *Moon) BrightLimbPositionAngleN(date time.Time, n int) float64 {
+	return basic.MoonBrightLimbPositionAngleNWithInstance(observationTT(date), n, module.inst)
 }
 
 // TopocentricBrightLimbPositionAngle 月亮站心明亮边缘位置角，单位度 / topocentric position angle of the Moon's bright limb in degrees.
-//
-// date 为观测时刻；observerLon/observerLat 为观测者经纬度，东正西负、北正南负；height 为椭球高（大地高），单位米。
-// date is the observing instant; observerLon/observerLat are east-positive and north-positive; height is observer elevation in meters.
-func TopocentricBrightLimbPositionAngle(date time.Time, observerLon, observerLat, height float64) float64 {
-	return TopocentricBrightLimbPositionAngleN(date, observerLon, observerLat, height, -1)
+func (module *Moon) TopocentricBrightLimbPositionAngle(date time.Time, observerLon, observerLat, height float64) float64 {
+	return module.TopocentricBrightLimbPositionAngleN(date, observerLon, observerLat, height, -1)
 }
 
-// TopocentricBrightLimbPositionAngleN 月亮站心明亮边缘位置角（截断版），单位度 / truncated topocentric position angle of the Moon's bright limb in degrees.
-func TopocentricBrightLimbPositionAngleN(date time.Time, observerLon, observerLat, height float64, n int) float64 {
-	return basic.MoonTopocentricBrightLimbPositionAngleN(observationTT(date), observerLon, observerLat, height, n)
+// TopocentricBrightLimbPositionAngleN 月亮站心明亮边缘位置角（n 变体），单位度 / n-parameterised topocentric position angle of the Moon's bright limb in degrees.
+func (module *Moon) TopocentricBrightLimbPositionAngleN(date time.Time, observerLon, observerLat, height float64, n int) float64 {
+	return basic.MoonTopocentricBrightLimbPositionAngleNWithInstance(observationTT(date), observerLon, observerLat, height, n, module.inst)
 }
 
 func observationTT(date time.Time) float64 {