feat: Migrate SAL to Cargo workspace

- Migrate individual modules to independent crates
- Refactor dependencies for improved modularity
- Update build system and testing infrastructure
- Update documentation to reflect new structure

vault/tests/rhai_integration_tests.rs

@@ -1,5 +1,12 @@
 use rhai::{Engine, EvalAltResult};
 use sal_vault::rhai::*;
+use std::sync::Mutex;
+
+// NOTE: These tests use global state (SESSION and KEYSPACE_REGISTRY) and are automatically
+// serialized using a global mutex to prevent test interference during parallel execution.
+
+// Global test mutex to ensure tests run sequentially
+static TEST_MUTEX: Mutex<()> = Mutex::new(());
 
 #[cfg(test)]
 mod rhai_integration_tests {
@@ -13,6 +20,7 @@ mod rhai_integration_tests {
 
     #[test]
     fn test_rhai_module_registration() {
+        let _guard = TEST_MUTEX.lock().unwrap();
         let engine = create_test_engine();
 
         // Test that the functions are registered by checking if they exist
@@ -32,6 +40,7 @@ mod rhai_integration_tests {
 
     #[test]
     fn test_symmetric_encryption_functions() {
+        let _guard = TEST_MUTEX.lock().unwrap();
         let engine = create_test_engine();
 
         let script = r#"
@@ -52,6 +61,7 @@ mod rhai_integration_tests {
 
     #[test]
     fn test_keyspace_functions() {
+        let _guard = TEST_MUTEX.lock().unwrap();
         let engine = create_test_engine();
 
         let script = r#"
@@ -78,6 +88,7 @@ mod rhai_integration_tests {
 
     #[test]
     fn test_keypair_functions() {
+        let _guard = TEST_MUTEX.lock().unwrap();
         let engine = create_test_engine();
 
         let script = r#"
@@ -116,6 +127,7 @@ mod rhai_integration_tests {
 
     #[test]
     fn test_signing_functions() {
+        let _guard = TEST_MUTEX.lock().unwrap();
         let engine = create_test_engine();
 
         let script = r#"
@@ -157,6 +169,7 @@ mod rhai_integration_tests {
 
     #[test]
     fn test_session_management() {
+        let _guard = TEST_MUTEX.lock().unwrap();
         let engine = create_test_engine();
 
         let script = r#"
@@ -169,7 +182,8 @@ mod rhai_integration_tests {
             
             // Test listing keyspaces
             let spaces = list_keyspaces();
-            if spaces.len() < 2 {
+            let space_count = count_keyspaces();
+            if space_count < 2 {
                 throw "Should have at least 2 keyspaces";
             }
             
@@ -182,7 +196,8 @@ mod rhai_integration_tests {
             
             // Test listing keypairs in current space
             let keypairs = list_keypairs();
-            if keypairs.len() != 1 {
+            let keypair_count = count_keypairs();
+            if keypair_count != 1 {
                 throw "Should have exactly 1 keypair in space2";
             }
             
@@ -199,6 +214,7 @@ mod rhai_integration_tests {
 
     #[test]
     fn test_error_handling() {
+        let _guard = TEST_MUTEX.lock().unwrap();
         let engine = create_test_engine();
 
         let script = r#"