ci: lint all targets, run interop suites for real, compile benches

- clippy --all-targets plus a clawhdf5-format feature matrix (parallel, lz4,
  zstd, pcodec, fast-checksum); fix the accumulated lint backlog in test,
  bench and feature-gated code (no behaviour changes).
- Install python3 + h5py/numpy/netCDF4/xarray in the CI container and set
  CLAWHDF5_REQUIRE_INTEROP=1, which makes a missing interop dependency a test
  failure. Every h5py/netCDF4 interop test used to skip silently in CI. Run
  the #[ignore]d writer_h5py_tests suite explicitly.
- cargo bench --no-run so benches can't rot; fix bench.rs and memory_bench.rs,
  which no longer compiled against the current strategy/consolidation APIs.
- Optional fuzz smoke run via CLAWHDF5_FUZZ_SECONDS.
- CHANGELOG and docs/known-issues.md updated.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

crates/clawhdf5-format/src/chunked_read.rs

@@ -1657,9 +1657,9 @@ mod tests {
             let chunk_bytes = chunk_size_elems * elem_size; // full chunk allocation
 
             // Write chunk data (full chunk size, padding with zeros)
-            for i in start..end {
+            for (i, value) in values.iter().enumerate().take(end).skip(start) {
                 let byte_offset = data_offset + (i - start) * elem_size;
-                file_data[byte_offset..byte_offset + 8].copy_from_slice(&values[i].to_le_bytes());
+                file_data[byte_offset..byte_offset + 8].copy_from_slice(&value.to_le_bytes());
             }
 
             chunk_infos.push(ChunkInfo {
@@ -1837,8 +1837,8 @@ mod tests {
         for chunk_idx in 0..2 {
             let start = chunk_idx * chunk_elems;
             let mut chunk_bytes = Vec::new();
-            for i in start..start + chunk_elems {
-                chunk_bytes.extend_from_slice(&values[i].to_le_bytes());
+            for value in values.iter().skip(start).take(chunk_elems) {
+                chunk_bytes.extend_from_slice(&value.to_le_bytes());
             }
             let compressed = compress_chunk(&chunk_bytes, &pipeline, elem_size as u32).unwrap();