chore: standardize executor type naming to kebab-case (#209)

backend/migrations/20250716161432_update_executor_names_to_kebab_case.sql

@@ -0,0 +1,20 @@
+-- Migration to update executor type names from snake_case/camelCase to kebab-case
+-- This handles the change from charmopencode -> charm-opencode and setup_script -> setup-script
+
+-- Update task_attempts.executor column
+UPDATE task_attempts 
+SET executor = 'charm-opencode' 
+WHERE executor = 'charmopencode';
+
+UPDATE task_attempts 
+SET executor = 'setup-script' 
+WHERE executor = 'setup_script';
+
+-- Update execution_processes.executor_type column
+UPDATE execution_processes 
+SET executor_type = 'charm-opencode' 
+WHERE executor_type = 'charmopencode';
+
+UPDATE execution_processes 
+SET executor_type = 'setup-script' 
+WHERE executor_type = 'setup_script';