Add bounded commit-pinned Hugging Face source streaming

crates/remora-hf-source/src/lib.rs

@@ -0,0 +1,24 @@
+mod body;
+mod error;
+mod sort;
+mod source;
+mod types;
+
+pub use body::HfSourceBody;
+pub use error::HfSourceError;
+pub use source::{HfInventory, HfSource};
+pub use types::{
+    HfInventoryDescriptor, HfMember, HfMemberStorage, HfRepoType, HfSelection, HfSnapshotIdentity,
+    HfSourceRequest,
+};
+
+fn digest_hex(bytes: impl AsRef<[u8]>) -> String {
+    const DIGITS: &[u8; 16] = b"0123456789abcdef";
+    let bytes = bytes.as_ref();
+    let mut encoded = String::with_capacity(bytes.len() * 2);
+    for &byte in bytes {
+        encoded.push(DIGITS[(byte >> 4) as usize] as char);
+        encoded.push(DIGITS[(byte & 0x0f) as usize] as char);
+    }
+    encoded
+}