rvf-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.