message: chore: change all `unwrap()` in `store.rs` to `expect(..)` with a significant message
diff: @@ -250,7 +250,7 @@ impl<T: KeyValueDB> ChainStore for ChainKVStore<T> {
  .try_fold(Capacity::zero(), |capacity, output| {
  capacity.safe_add(output.capacity)
  })
  - .unwrap()
  + .expect("accumulated capacity in genesis block should not overflow")
  })
  .unwrap_or_else(Capacity::zero)
  .as_u64(),
  @@ -301,7 +301,7 @@ impl<T: KeyValueDB> ChainStore for ChainKVStore<T> {
  fn get_block_number(&self, hash: &H256) -> Option<BlockNumber> {
  self.get(COLUMN_INDEX, hash.as_bytes())
  - .map(|raw| deserialize(&raw[..]).unwrap())
  + .map(|raw| deserialize(&raw[..]).expect("deserialize block number should be ok"))
  }
  fn get_tip_header(&self) -> Option<Header> {
  @@ -367,7 +367,7 @@ impl<T: KeyValueDB> ChainStore for ChainKVStore<T> {
  COLUMN_CELL_META,
  CellKey::calculate(tx_hash, index).as_ref(),
  )
  - .map(|raw| deserialize(&raw[..]).unwrap())
  + .map(|raw| deserialize(&raw[..]).expect("deserialize cell meta should be ok"))
  }
  fn get_cell_output(&self, tx_hash: &H256, index: u32) -> Option<CellOutput> {
  