RVF durable COW v0.3.4

Durable COW branches and sparse-ID correctness

This release completes queryable, durable RVF copy-on-write branches and corrects immediate read-through for one-based and sparse vector IDs.

Published packages

• crates.io: rvf-runtime 0.3.2
• npm: @ruvector/rvf 0.3.4
• npm: @ruvector/rvf-node 0.2.3
• npm: all five @ruvector/rvf-node-<platform> packages at 0.2.2

Security and correctness

• membership capacity is derived from the highest vector ID, with checked overflow
• dense membership allocation is capped at 64 MiB to fail closed against allocation abuse
• branch lineage, edits, tombstones, ID maps, and relative parent references survive reopen and relocation
• affected npm releases are deprecated with upgrade guidance

Validation

• 14/14 COW integration tests and 9/9 membership tests
• five-platform native build matrix
• clippy with warnings denied, formatting, lockfile integrity, dependency review, cargo-deny, RustSec, and npm audit
• clean-registry native and SDK immediate/reopen COW smoke tests

Merged in #740 and #741.