Squashed 'vendor/ruvector/' content from commit b64c2172

git-subtree-dir: vendor/ruvector
git-subtree-split: b64c21726f2bb37286d9ee36a7869fef60cc6900

examples/rvf/src/lib.rs

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+//! RVF examples crate.
+//!
+//! This crate contains example binaries demonstrating usage of the RVF
+//! (RuVector Format) crates. Run individual examples with:
+//!
+//! ```bash
+//! cargo run --example basic_store
+//! cargo run --example progressive_index
+//! cargo run --example quantization
+//! cargo run --example wire_format
+//! cargo run --example crypto_signing
+//! cargo run --example filtered_search
+//! ```
+//!
+//! Solver integration examples (sublinear solver + RVF):
+//!
+//! ```bash
+//! cargo run --example solver_witness        # convergence witness chains
+//! cargo run --example sparse_matrix_store   # CSR sparse matrix storage
+//! cargo run --example solver_benchmark      # benchmark result analysis
+//! ```