v0.2.4

Nightly release 0.2.4, published to crates.io.

Highlights

• Reader metadata (^{...} / ^:tag) now stays attached to the value it annotates and reads back identically across the interpreter, JIT, and compiled tiers; quoted metadata forms also lower correctly instead of being rejected.
• Added ad-hoc hierarchies (derive, underive, isa?, parents/ancestors/descendants) and hierarchy-aware multimethod dispatch.

Highlights are summarized by Claude from the commit log; the full list below is authoritative.

What's Changed

• fix(reader): keep reader metadata on the value by @BuddhiLW in #345
• feat(core): implement ad-hoc hierarchies and hierarchy dispatch by @BuddhiLW in #346

Full Changelog: v0.2.3...v0.2.4