Expose compaction pri through C API #1485

Job	Run time
build-linux-cmake-mingw	12m 24s
build-linux-cmake-with-folly	24m 10s
build-linux-cmake-with-benchmark	17m 58s
build-linux-cmake-with-folly-coroutines	26m 12s
build-linux	15m 18s
build-linux-cmake-with-folly-lite-no-test	7m 43s
build-linux-encrypted_env-no_compression	14m 49s
build-linux-gcc-7-with-folly	22m 33s
build-linux-gcc-7-with-folly-lite-no-test	7m 38s
check-format-and-targets	27s
build-linux-release	13m 27s
build-examples	10m 45s
build-fuzzers	8m 46s
build-linux-clang10-asan	15m 2s
build-linux-clang10-clang-analyze	16m 29s
build-linux-clang10-mini-tsan	21m 15s
build-linux-clang10-ubsan	14m 50s
build-linux-clang-13-no_test_run	6m 55s
build-linux-clang-no_test_run	11m 37s
build-linux-gcc-10-cxx20-no_test_run	8m 41s
build-linux-gcc-11-no_test_run	9m 6s
build-linux-gcc-8-no_test_run	8m 21s
build-linux-mini-crashtest	29m 39s
build-linux-release-rtti	11m 52s
build-linux-static_lib-alt_namespace-status_checked	17m 7s
build-linux-unity-and-headers	12m 10s
build-linux-arm	12m 58s
build-linux-java	14m 51s
build-linux-java-pmd	11m 37s
build-linux-java-static	11m 42s
build-macos	15m 14s
build-macos-cmake (true)	36m 4s
build-macos-cmake (false)	42m 37s
build-macos-java	14m 49s
build-macos-java-static	17m 8s
build-macos-java-static-universal	19m 25s
build-windows-vs2019	50m 50s
	10h 12m 29s

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