Add cleanup script and remove unused git version variables

- Add comprehensive cleanup script (scripts/cleanup.sh) to remove build artifacts
- Remove unused VERGEN_GIT_* environment variables from Rust build functions
- Cleanup script preserves source code while removing outputs, cache, and temp files

scripts/compile-components.sh

@@ -142,7 +142,7 @@ build_mycelium_component() {
     . ~/.cargo/env
     
     # Build with musl target for static linking from myceliumd directory
-    cargo build --release --target x86_64-unknown-linux-musl
+    cargo build --release --target x86_64-unknown-linux-musl --features vendored-openssl
     
     # Debug: Check what was actually built
     echo "    Checking build results..."