deps: bump sqlitegraph 3.0.3 -> 3.2.5

Picks up HNSW performance fixes:
- Incremental persist_topology (3.2.4)
- search_layer_fn eliminating vector clone storm (3.2.5)

Author: oldnordic

Cargo.lock

@@ -31,7 +31,7 @@ rusqlite = { version = "0.31", features = ["bundled"] }
 magellan = { version = "4.2.0", default-features = false, features = ["sqlite-backend"] }
 
 # sqlitegraph for GraphBackend trait
-sqlitegraph = { version = "3.0.3", default-features = false, features = ["sqlite-backend"] }
+sqlitegraph = { version = "3.2.5", default-features = false, features = ["sqlite-backend"] }
 
 # Serialization
 serde = { version = "1.0", features = ["derive"] }