Spinnaker Release 2026.0.3

clouddriver/eureka: remove leading slashes from all the retrofit2 api interfaces (#7652) (#7660) ( 5900380b )
echo: Fix Microsoft Teams webhook URL doubling in Retrofit2 migration (#7718) (#7720) ( 5aec138d )
echo: GitHub status conversion exception (#7701) (#7707) ( 5c41f281 )
tests: Add tests around retrofit incorrect call handling from previous PR (#7710) (#7723) ( 7770adf6 )
yaml: A few classes were not using safe constructors. Fix these (#7669) (backport to 2026.0.x) (#7690) ( 4cbe1d5f )