feat: reorganize examples and add signature support to JobBuilder

- Reorganized examples into osiris/, sal/, and utils/ folders
- Moved hardcoded scripts to separate .rhai files
- Added signature() method to JobBuilder for job signing
- Updated OSIRIS context to use block_in_place instead of runtime
- Removed runtime field from OsirisContext
- Added typed save() methods for Note and Event objects
- Updated all examples to use new structure and APIs

examples/sal/scripts/kubernetes/namespace_management.rhai

@@ -0,0 +1,95 @@
+//! Kubernetes namespace management example
+//!
+//! This script demonstrates namespace creation and management operations.
+//! 
+//! Prerequisites:
+//! - A running Kubernetes cluster
+//! - Valid kubeconfig file or in-cluster configuration
+//! - Permissions to create and manage namespaces
+//!
+//! Usage:
+//!   herodo examples/kubernetes/namespace_management.rhai
+
+print("=== SAL Kubernetes Namespace Management Example ===");
+
+// Create a KubernetesManager
+let km = kubernetes_manager_new("default");
+print("Created KubernetesManager for namespace: " + namespace(km));
+
+// Define test namespace names
+let test_namespaces = [
+    "sal-test-namespace-1",
+    "sal-test-namespace-2", 
+    "sal-example-app"
+];
+
+print("\n--- Creating Test Namespaces ---");
+for ns in test_namespaces {
+    print("Creating namespace: " + ns);
+    try {
+        namespace_create(km, ns);
+        print("✓ Successfully created namespace: " + ns);
+    } catch(e) {
+        print("✗ Failed to create namespace " + ns + ": " + e);
+    }
+}
+
+// Wait a moment for namespaces to be created
+print("\nWaiting for namespaces to be ready...");
+
+// Verify namespaces were created
+print("\n--- Verifying Namespace Creation ---");
+for ns in test_namespaces {
+    let exists = namespace_exists(km, ns);
+    if exists {
+        print("✓ Namespace '" + ns + "' exists");
+    } else {
+        print("✗ Namespace '" + ns + "' was not found");
+    }
+}
+
+// List all namespaces to see our new ones
+print("\n--- Current Namespaces ---");
+let all_namespaces = namespaces_list(km);
+print("Total namespaces in cluster: " + all_namespaces.len());
+for ns in all_namespaces {
+    if ns.starts_with("sal-") {
+        print("  🔹 " + ns + " (created by this example)");
+    } else {
+        print("  - " + ns);
+    }
+}
+
+// Test idempotent creation (creating the same namespace again)
+print("\n--- Testing Idempotent Creation ---");
+let test_ns = test_namespaces[0];
+print("Attempting to create existing namespace: " + test_ns);
+try {
+    namespace_create(km, test_ns);
+    print("✓ Idempotent creation successful (no error for existing namespace)");
+} catch(e) {
+    print("✗ Unexpected error during idempotent creation: " + e);
+}
+
+// Create managers for the new namespaces and check their properties
+print("\n--- Creating Managers for New Namespaces ---");
+for ns in test_namespaces {
+    try {
+        let ns_km = kubernetes_manager_new(ns);
+        print("✓ Created manager for namespace: " + namespace(ns_km));
+        
+        // Get resource counts for the new namespace (should be mostly empty)
+        let counts = resource_counts(ns_km);
+        print("  Resource counts: " + counts);
+    } catch(e) {
+        print("✗ Failed to create manager for " + ns + ": " + e);
+    }
+}
+
+print("\n--- Cleanup Instructions ---");
+print("To clean up the test namespaces created by this example, run:");
+for ns in test_namespaces {
+    print("  kubectl delete namespace " + ns);
+}
+
+print("\n=== Namespace management example completed! ===");