Fixes:
- Address slowness of the validator rpc endpoint (#3960)
- Implement FramedWriter with buffer limits and stats (#4012)
- Fix some state sync related issues that may cause node to crash or have high cpu usage (#4016, #3988, #3986)
- Fix an issue that may cause the network the slow down temporarily (#4116)
- Mitigate an issue that may cause some nonvalidating nodes to stall (#4102)