maximize type stability

Co-Authored-By: Shuhei Kadowaki <40514306+aviatesk@users.noreply.github.com>

Author: abap34

src/config.jl

@@ -173,7 +173,7 @@ Retrieves the current configuration value.
 Among the registered configuration files, fetches the value in order of priority (see `Base.lt(::ConfigFileOrder, path1, path2)`).
 If the key path does not exist in any of the configurations, returns `nothing`.
 """
-function get_config(manager::ConfigManager, key_path::Symbol...)
+Base.@constprop :aggressive function get_config(manager::ConfigManager, key_path::Symbol...)
     try
         is_static_setting(key_path...) &&
             return getobjpath(load(manager).static_settings, key_path...)

src/utils/general.jl

@@ -118,7 +118,7 @@ may be unset (set to `nothing`) depending on client/server capabilities.
 Traverses the field chain `paths...` of `obj`, and returns `nothing` if any
 `nothing` field is encountered along the way.
 """
-function getobjpath(obj, path::Symbol, paths::Symbol...)
+@noinline Base.@constprop :aggressive function getobjpath(obj, path::Symbol, paths::Symbol...)
     nextobj = @something getfield(obj, path) return nothing
     getobjpath(nextobj, paths...)
 end