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/max_declination.go

@@ -15,43 +15,43 @@ type MaximumDeclinationInfo struct {
 }
 
 // MaximumNorthDeclinationsInMonth 指定年月内的所有月球最大北赤纬事件 / all maximum northern lunar declination events in the given Gregorian month.
-func MaximumNorthDeclinationsInMonth(year int, month time.Month) []MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfos(basic.MoonMaximumNorthDeclinations(year, month))
+func (module *Moon) MaximumNorthDeclinationsInMonth(year int, month time.Month) []MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfos(basic.MoonMaximumNorthDeclinationsWithInstance(year, month, module.inst))
 }
 
 // MaximumSouthDeclinationsInMonth 指定年月内的所有月球最大南赤纬事件 / all maximum southern lunar declination events in the given Gregorian month.
-func MaximumSouthDeclinationsInMonth(year int, month time.Month) []MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfos(basic.MoonMaximumSouthDeclinations(year, month))
+func (module *Moon) MaximumSouthDeclinationsInMonth(year int, month time.Month) []MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfos(basic.MoonMaximumSouthDeclinationsWithInstance(year, month, module.inst))
 }
 
 // LastMaximumNorthDeclination 指定时刻之前最近一次月球最大北赤纬 / last maximum northern lunar declination at or before date.
-func LastMaximumNorthDeclination(date time.Time) MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfo(date, basic.LastMoonMaximumNorthDeclination(timeToUTJDE(date)))
+func (module *Moon) LastMaximumNorthDeclination(date time.Time) MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfo(date, basic.LastMoonMaximumNorthDeclinationWithInstance(timeToUTJDE(date), module.inst))
 }
 
 // NextMaximumNorthDeclination 指定时刻之后最近一次月球最大北赤纬 / next maximum northern lunar declination after date.
-func NextMaximumNorthDeclination(date time.Time) MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfo(date, basic.NextMoonMaximumNorthDeclination(timeToUTJDE(date)))
+func (module *Moon) NextMaximumNorthDeclination(date time.Time) MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfo(date, basic.NextMoonMaximumNorthDeclinationWithInstance(timeToUTJDE(date), module.inst))
 }
 
 // ClosestMaximumNorthDeclination 离指定时刻最近一次月球最大北赤纬 / closest maximum northern lunar declination to date.
-func ClosestMaximumNorthDeclination(date time.Time) MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfo(date, basic.ClosestMoonMaximumNorthDeclination(timeToUTJDE(date)))
+func (module *Moon) ClosestMaximumNorthDeclination(date time.Time) MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfo(date, basic.ClosestMoonMaximumNorthDeclinationWithInstance(timeToUTJDE(date), module.inst))
 }
 
 // LastMaximumSouthDeclination 指定时刻之前最近一次月球最大南赤纬 / last maximum southern lunar declination at or before date.
-func LastMaximumSouthDeclination(date time.Time) MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfo(date, basic.LastMoonMaximumSouthDeclination(timeToUTJDE(date)))
+func (module *Moon) LastMaximumSouthDeclination(date time.Time) MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfo(date, basic.LastMoonMaximumSouthDeclinationWithInstance(timeToUTJDE(date), module.inst))
 }
 
 // NextMaximumSouthDeclination 指定时刻之后最近一次月球最大南赤纬 / next maximum southern lunar declination after date.
-func NextMaximumSouthDeclination(date time.Time) MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfo(date, basic.NextMoonMaximumSouthDeclination(timeToUTJDE(date)))
+func (module *Moon) NextMaximumSouthDeclination(date time.Time) MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfo(date, basic.NextMoonMaximumSouthDeclinationWithInstance(timeToUTJDE(date), module.inst))
 }
 
 // ClosestMaximumSouthDeclination 离指定时刻最近一次月球最大南赤纬 / closest maximum southern lunar declination to date.
-func ClosestMaximumSouthDeclination(date time.Time) MaximumDeclinationInfo {
-	return convertMaximumDeclinationInfo(date, basic.ClosestMoonMaximumSouthDeclination(timeToUTJDE(date)))
+func (module *Moon) ClosestMaximumSouthDeclination(date time.Time) MaximumDeclinationInfo {
+	return convertMaximumDeclinationInfo(date, basic.ClosestMoonMaximumSouthDeclinationWithInstance(timeToUTJDE(date), module.inst))
 }
 
 func convertMaximumDeclinationInfos(events []basic.DeclinationEvent) []MaximumDeclinationInfo {