Added messages needed by compact log backup (#1256)

* added compaction log

Signed-off-by: hillium <[email protected]>

* added compaction meta

Signed-off-by: hillium <[email protected]>

* added type for compaction

Signed-off-by: hillium <[email protected]>

* added migration

Signed-off-by: hillium <[email protected]>

* refine prepare backup

Signed-off-by: hillium <[email protected]>

* added crc64xor for backup

Signed-off-by: hillium <[email protected]>

* update field name

Signed-off-by: hillium <[email protected]>

* rename compaction to subcompaction; compactionrun to compactin

Signed-off-by: hillium <[email protected]>

* update names

Signed-off-by: hillium <[email protected]>

* added deletion

Signed-off-by: hillium <[email protected]>

* added hint for deleting generated ssts

Signed-off-by: hillium <[email protected]>

* added rewrite meta

Signed-off-by: hillium <[email protected]>

* make migration meta-based

Signed-off-by: hillium <[email protected]>

* refine MetaEditr

Signed-off-by: hillium <[email protected]>

* added destruct prefix

Signed-off-by: hillium <[email protected]>

* fix subcomactions

Signed-off-by: hillium <[email protected]>

* added table id for subcompaction meta

Signed-off-by: hillium <[email protected]>

* added a newline to end of file

Signed-off-by: hillium <[email protected]>

* added more comments

Signed-off-by: hillium <[email protected]>

* address comments

Signed-off-by: hillium <[email protected]>

* added some fields

Signed-off-by: hillium <[email protected]>

* make epoch repeated

Signed-off-by: hillium <[email protected]>

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Signed-off-by: hillium <[email protected]>
Signed-off-by: hillium <[email protected]>