Changes since v1.54.0:
- a215792 fix(import,merge): close writer/readers on error paths
- bb5c980 fix(split): correct --file-count output and release writer on error
- 5bd7acf fix(meta): close parquet file reader after use
- 51d06c6 fix(cat): size CSV/TSV output slice by field list
- 2116e12 test(ci): cover S3-compatible object stores
- e6c4b1e fix(io): honor configured S3 endpoints
- e16b920 refactor(schema): streamline immutable rendering
- bcfdb21 test(schema): cover rendering cleanup
- a50fad4 test(schema): cover nil rendering clone
- 00f89d2 fix(schema): preserve tree during rendering
- e2442d2 test(schema): cover renderer immutability
- c66b6ac fix(io): use HEAD for S3 region discovery
- b25d342 test: restore and improve coverage