Add breaking and release notes

Author: romac

BREAKING_CHANGES.md

@@ -2,7 +2,17 @@
 
 ## Unreleased
 
+### `malachitebft-core-types`
+- Removed the VoteSet synchronization protocol, as it is neither required nor sufficient for liveness.
+  See ([#998](https://github.com/informalsystems/malachite/issues/998)) for more details.
+
+### `malachitebft-core-consensus`
+- Removed the VoteSet synchronization protocol, as it is neither required nor sufficient for liveness.
+  See ([#998](https://github.com/informalsystems/malachite/issues/998)) for more details.
+
 ### `malachitebft-engine`
+- Removed the VoteSet synchronization protocol, as it is neither required nor sufficient for liveness.
+  See ([#998](https://github.com/informalsystems/malachite/issues/998)) for more details.
 - Changed the reply channel of `GetValidatorSet` message to take an `Option<Ctx::ValidatorSet>` instead of `Ctx::ValidatorSet`.
 - Changed `PartStore::all_parts` to `PartStore::all_parts_by_stream_id`:
   - Renamed method to clarify that, when a new part is received, the contiguous parts should be queried by stream id
@@ -11,6 +21,10 @@
 - Added `&StreamId` parameter to `part_store::PartStore::store`
 - Added `&StreamId` parameter to `part_store::PartStore::store_value_id`
 
+### `malachitebft-sync`
+- Removed the VoteSet synchronization protocol, as it is neither required nor sufficient for liveness.
+  See ([#998](https://github.com/informalsystems/malachite/issues/998)) for more details.
+
 ## 0.2.0
 
 ### `malachitebft-core-types`

RELEASE_NOTES.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Removed the VoteSet synchronization protocol, as it is neither required nor sufficient for liveness.
+  See ([#998](https://github.com/informalsystems/malachite/issues/998)) for more details.
 - Reply to `GetValidatorSet` is now optional ([#990](https://github.com/informalsystems/malachite/issues/990))
 - Clarify and improve the application handling of multiple proposals for same height and round ([#833](https://github.com/informalsystems/malachite/issues/833))