Resolves review #003 findings M1, M2, L1, and L2.
- offset-indirect (L1 + M2 arm): rework read_*_indirect to same-buffer
absolute offsets (safetensors-style, per the metatensor model) and add
write_*_indirect. Wire the encoding dispatch into engine.read_field/
write_field and the aligned materializer. Previously the encoding was
laid out but never read back.
- field-level endian override (M1): thread field.effective_endian through
sequential_reader, engine.read_field/write_field, and
materialize_struct_aligned. Previously a per-field endian override was
silently ignored, misreading multi-byte values.
- aligned-mode materialization (M2): materialize fixed-size arrays via
their vals[i] offset-map entries and maxLength reservations as
zero-padded fixed-size slices (trailing NULs trimmed). Previously both
read garbage or errored.
- dead endian param (L2): drop the ignored endian argument from
materialize_packed/materialize_aligned; endianness is read from the
root struct.
Verification: cargo test --release (404 pass), cargo clippy --all-targets
-- -D warnings (clean), cargo build --target wasm32-unknown-unknown
--release (clean), cargo llvm-cov --release (89.60% lines).
deepseek-v4-pro
e5c7cc1ca2