azimafroozeh - add fastlanes expression encoding for type int64_t #106

Job	Run time
check-format (ubuntu-latest)	10s
build (ubuntu-latest, Debug, clang++)	5m 21s
build (ubuntu-latest, Release, clang++)	5m 28s
build (macos-latest, Debug, clang++)	2m 31s
build (macos-latest, Release, clang++)	2m 41s
build (president, Debug, clang++)	1s
build (president, Release, clang++)	1s
build (windows-latest, Debug, clang++)	5m 57s
build (windows-latest, Release, clang++)	5m 45s
example	0s
generate_dataset	0s
build-iwyu	0s
test	0s
	27m 55s

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