v1.6.1

Patch release. No command, flag, exit code, or JSON field changed since v1.6.0 — the capabilities catalog (paredit inspect capabilities --output json) diffs identical against the tag.

• Hardened syntax traversal and parallel batch analysis: offset-to-node lookup and child-position lookup are now logarithmic (binary search over ordered children) instead of a linear scan, and batch fix/analysis scheduling now claims work dynamically across threads instead of static contiguous chunks, so one large file no longer pins a worker while the rest sit idle. Internal only — no observable behavior change.
• Documented paredit editor <file> in the Command model section of the API reference; it was previously only in the README's command table.
• Checked in a proptest regression seed for remove-unused so that failure stays reproducible in CI.