feat(core): Add fine-grained SecureChannel states
feat(core): Add fine-grained SecureChannel states

open62541/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541,JGrothoff/open62541,StalderT/open62541,open62541/open62541,JGrothoff/open62541,jpfr/open62541,StalderT/open62541,jpfr/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541,open62541/open62541,open62541/open62541