Add signon plugins and fix sonic-frameworks-sso devel files

Build signon-plugin-oauth2 (0.25 git snapshot) and
signon-kwallet-extension (26.04.3) for SonicDE, linking against
sonic-frameworks-sso and sonic-frameworks-keyring.

Update sonic-frameworks-sso to release 9: install plugin development
files (headers, pkgconfig, symlinks, CamelCase forwarding headers)
that the CMake fork doesn't install, needed to build signon plugins.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

signon-kwallet-extension/signon-kwallet-extension.spec

@@ -0,0 +1,60 @@
+%undefine __cmake_in_source_build
+
+Name:    signon-kwallet-extension
+Version: 26.04.3
+Release: 1%{?dist}
+Summary: KWallet integration for Sign-on framework
+
+License: GPL-2.0-or-later
+URL:     https://invent.kde.org/network/%{name}
+
+%global revision %(echo %{version} | cut -d. -f3)
+%if %{revision} >= 50
+%global stable unstable
+%else
+%global stable stable
+%endif
+Source0:        https://download.kde.org/%{stable}/release-service/%{version}/src/%{name}-%{version}.tar.xz
+
+BuildRequires:  make
+BuildRequires:  cmake
+BuildRequires:  sonic-frameworks-cmake-modules
+BuildRequires:  sonic-frameworks-keyring-devel
+BuildRequires:  qt6-qtbase-devel
+BuildRequires:  sonic-frameworks-sso-devel
+
+Supplements:    (sonic-frameworks-keyring-libs and sonic-frameworks-sso)
+
+%description
+%{summary}.
+
+%prep
+%autosetup -p1
+
+# Fix FindSignOnExtension.cmake to look for the actual header filename
+# (upstream uses CamelCase but the SonicDE SSO fork installs lowercase headers)
+sed -i 's|SignOn/AbstractSecretsStorage|SignOn/abstract-secrets-storage.h|' \
+    cmake/modules/FindSignOnExtension.cmake
+
+# Fix includes: SonicDE SSO fork uses lowercase header names
+sed -i 's|#include <SignOn/ExtensionInterface>|#include <SignOn/extension-interface.h>|' \
+    src/keyringplugin.h
+sed -i 's|#include <SignOn/AbstractSecretsStorage>|#include <SignOn/abstract-secrets-storage.h>|' \
+    src/keyringplugin.cpp src/secretsstorage.h src/secretsstorage.cpp
+
+%build
+%cmake_kf6 \
+    -DQT_MAJOR_VERSION=6
+
+%cmake_build
+
+%install
+%cmake_install
+
+%files
+%license COPYING
+%{_libdir}/signond/extensions/libkeyring-kwallet.so
+
+%changelog
+* Fri Aug 28 2026 SonicDE <dev@sonicde.org> - 26.04.3-1
+- Build 26.04.3 for SonicDE, link against sonic-frameworks-sso and sonic-frameworks-keyring