ci(postgres): permit benchmark-only unused helpers

crates/ruvector-postgres/benches/distance_bench.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code, unused_imports, unused_variables)]
+
 //! Comprehensive distance function benchmarks
 //!
 //! Compare SIMD vs scalar implementations across different vector sizes

crates/ruvector-postgres/benches/e2e_bench.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code, unused_imports, unused_variables)]
+
 //! End-to-End benchmarks for RuVector PostgreSQL extension
 //!
 //! Comprehensive benchmarks for:

crates/ruvector-postgres/benches/hybrid_bench.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code, unused_imports, unused_variables)]
+
 //! Hybrid search benchmarks
 //!
 //! Benchmarks for combining vector search with keyword/BM25 scoring:

crates/ruvector-postgres/benches/integrity_bench.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code, unused_imports, unused_variables)]
+
 //! Index integrity and graph maintenance benchmarks
 //!
 //! Benchmarks for v2 structural integrity features:

crates/ruvector-postgres/benches/quantization_bench.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code, unused_imports, unused_variables)]
+
 //! Comprehensive quantization benchmarks
 //!
 //! Compares exact vs quantized search with different quantization methods

crates/ruvector-postgres/benches/quantized_distance_bench.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code, unused_imports, unused_variables)]
+
 //! Benchmarks for quantized vector distance calculations
 //!
 //! Compares scalar vs SIMD implementations for all quantized types