Chief Executive Carrie Lam Cheng Yuet-ngor insisted Hong Kong’s freedoms and fundamentals would remain sound as she welcomed on Friday a tailor-made national security law to be passed by Beijing that would require new institutions to safeguard sovereignty and allow for mainland agencies to operate in the city when needed.Speaking hours after a resolution on the legislation presented to the country’s top legislative body, the National People’s Congress, fuelled anxiety and fears on its exact…