bug(sdk): Fix type conversion recursion

The compiler doesn't complain about this, so I assumed it
was able to correctly resolve a conversion
`BundleFileType` -> `Murmur64` via their shared `From` impl: `u64`.

But it appears that is not the case, and the simple `t.into()` just
calls itself. So I need to do the conversion via the intermediary value
manually.

lib/sdk/src/bundle/file.rs

@@ -397,7 +397,8 @@ impl From<BundleFileType> for u64 {
 }
 impl From<BundleFileType> for Murmur64 {
     fn from(t: BundleFileType) -> Murmur64 {
-        t.into()
+        let hash: u64 = t.into();
+        Murmur64::from(hash)
     }
 }