Pipe: Reduced the log of epoch switching & Optimized the memory calculation of insertion event & Refactor & Removed start-time / end-time restriction for scan parser & Added the missing parsing logic to table meta sync

Pipe: Reduced the log of epoch switching & Optimized the memory calculation of insertion event & Refactor & Removed start-time / end-time restriction for scan parser & Added the missing parsing logic to table meta sync #6419