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-migrate/src/sqlite_reader.rs

@@ -185,8 +185,10 @@ fn detect_embedding_dim(conn: &Connection, config: &SchemaConfig) -> SqlResult<O
 
 /// Parse a raw byte BLOB into a Vec<f32>.
 fn blob_to_f32(blob: &[u8]) -> Vec<f32> {
-    blob.chunks_exact(4)
-        .map(|b| f32::from_le_bytes([b[0], b[1], b[2], b[3]]))
+    blob.as_chunks::<4>()
+        .0
+        .iter()
+        .map(|b| f32::from_le_bytes(*b))
         .collect()
 }