fix: simplify filemeta MessagePack serialization and improve code quality

- Refactor `unmarshal_msg` to use `rmp_serde::from_slice` instead of manual parsing
- Add serde field renaming attributes to `FileMetaVersion` struct
- Remove 428 lines of manual MessagePack parsing code
- Improve string comparison using `!object.is_empty()` instead of `object != ""`
- Update volume directory numbering in run script from test{0..4} to test{1..4}
- Clean up unused imports and code

Fixes #517

scripts/run.sh

@@ -15,7 +15,7 @@ current_dir=$(pwd)
 echo "Current directory: $current_dir"
 
 # mkdir -p ./target/volume/test
-mkdir -p ./target/volume/test{0..4}
+mkdir -p ./target/volume/test{1..4}
 
 
 if [ -z "$RUST_LOG" ]; then
@@ -27,7 +27,7 @@ fi
 
 # export RUSTFS_STORAGE_CLASS_INLINE_BLOCK="512 KB"
 
-export RUSTFS_VOLUMES="./target/volume/test{0...4}"
+export RUSTFS_VOLUMES="./target/volume/test{1...4}"
 # export RUSTFS_VOLUMES="./target/volume/test"
 export RUSTFS_ADDRESS=":9000"
 export RUSTFS_CONSOLE_ENABLE=true