/usr/include/libindi/alignment/ is in libindi-dev 1.2.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libindi/alignment/AlignmentSubsystemForDrivers.h
/usr/include/libindi/alignment/AlignmentSubsystemForMathPlugins.h
/usr/include/libindi/alignment/BasicMathPlugin.h
/usr/include/libindi/alignment/BuiltInMathPlugin.h
/usr/include/libindi/alignment/ClientAPIForAlignmentDatabase.h
/usr/include/libindi/alignment/ClientAPIForMathPluginManagement.h
/usr/include/libindi/alignment/Common.h
/usr/include/libindi/alignment/ConvexHull.h
/usr/include/libindi/alignment/DriverCommon.h
/usr/include/libindi/alignment/InMemoryDatabase.h
/usr/include/libindi/alignment/MapPropertiesToInMemoryDatabase.h
/usr/include/libindi/alignment/MathPlugin.h
/usr/include/libindi/alignment/MathPluginManagement.h
/usr/include/libindi/alignment/SVDMathPlugin.h
/usr/include/libindi/alignment/TelescopeDirectionVectorSupportFunctions.h