Include paths and defines are still not passed to cppcheck with 1.2.4 (CDT project using a language settings provider) #35

Follow-up to #11.

Environment

• cppcheclipse 1.2.4.v20260812-0727
• Eclipse 4.39 / CDT 9.3 (Renesas e2 studio), Java 21
• cppcheck 2.22.0
• C project, Renesas LLVM (clang) toolchain for Arm, managed build
• language.settings.xml providers:
  com.renesas.cdt.managedbuild.llvm.arm.languageprovider,
  org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider,
  org.eclipse.cdt.ui.UserLanguageSettingsProvider

Settings: "Follow user-defined includes", "Follow system-defined includes",
"Include CDT User-Defined Symbols" and "Include CDT System-Defined Symbols" are checked.

Expected: cppcheck gets -I and -D from the project's include paths and macros.
Actual: no -I and no -D are passed. The plugin's findings are identical
(same 31 findings, same lines) to a plain command-line run without any -I or -D.
Command line from the plugin console:

Possible cause: ToolchainSettings reads ICLanguageSetting.getSettingEntries()
from the root folder of the active configuration. In this project the entries
come from language settings providers, which that call may not return.
LanguageSettingsManager / ILanguageSettingsProvidersKeeper might be needed.