Merge main (PR #52: build.rs fix, Nix flake, Swagger UI)

Author: chrishayuk

.gitignore

@@ -1,7 +1,6 @@
 # Rust
 target/
 **/*.rs.bk
-Cargo.lock
 
 # Python / maturin
 .venv/
@@ -27,6 +26,10 @@ build/
 # Checkpoints / temp
 *.checkpoint
 
+# Nix
+result
+result-*
+
 # output
 output/
 data/