kvspace-durable: 删除 byte kind，slack 后缀统一 uint8

src/headlenpow.rs

@@ -47,7 +47,7 @@ fn decimal(s: &str) -> Option<u64> {
 fn slack_count(s: &str, body: &[u8]) -> Option<u64> {
     match s {
         "char/utf8" => Some(std::str::from_utf8(body).ok()?.chars().count() as u64),
-        "byte" => Some(body.len() as u64),
+        "uint8" => Some(body.len() as u64),
         "char/ascii" if body.is_ascii() => Some(body.len() as u64),
         "char/utf32" if body.len() % 4 == 0 => {
             for chunk in body.chunks_exact(4) {
@@ -241,7 +241,7 @@ pub fn reserve(flags: u8, langtype: &str, content: usize, cap: usize) -> Option<
                     || decimal(&langtype[1..end]).is_none()
                     || !matches!(
                         &langtype[end + 1..],
-                        "char/utf8" | "byte" | "char/utf32" | "char/ascii"
+                        "char/utf8" | "uint8" | "char/utf32" | "char/ascii"
                     )
                 {
                     return None;

src/metadata.rs

@@ -40,7 +40,7 @@ pub fn encode(ro: bool, vid: u32) -> Option<Vec<u8>> {
     let mut body = [0u8; 5];
     body[0] = u8::from(ro);
     body[1..].copy_from_slice(&vid.to_le_bytes());
-    headlenpow::encode(6, 1, 5, 5, "[5]byte", &body, 5)
+    headlenpow::encode(6, 1, 5, 5, "[5]uint8", &body, 5)
 }
 
 pub fn decode(data: &[u8]) -> Option<(bool, u32)> {
@@ -49,7 +49,7 @@ pub fn decode(data: &[u8]) -> Option<(bool, u32)> {
         || h.flags != 1
         || h.a != 5
         || h.b != 5
-        || h.langtype != "[5]byte"
+        || h.langtype != "[5]uint8"
         || h.body[0] > 1
     {
         return None;

src/xvalue.rs

@@ -422,7 +422,7 @@ pub fn encode_head(kind: &str, r#ref: i32, dims: &[i32], raw: &[u8]) -> Vec<u8>
         return Vec::new();
     } else if kind.is_empty() || kind == "None" {
         (5, 0, 0, 0, String::new())
-    } else if matches!(kind, "char/utf8" | "char/ascii" | "char/utf32" | "byte") {
+    } else if matches!(kind, "char/utf8" | "char/ascii" | "char/utf32") {
         let count = match kind {
             "char/utf8" => std::str::from_utf8(raw).ok().map(|s| s.chars().count()),
             "char/ascii" if raw.is_ascii() => Some(raw.len()),
@@ -434,7 +434,6 @@ pub fn encode_head(kind: &str, r#ref: i32, dims: &[i32], raw: &[u8]) -> Vec<u8>
             {
                 Some(raw.len() / 4)
             }
-            "byte" => Some(raw.len()),
             _ => None,
         };
         let Some(count) = count else {