re-uploading work

migrations/20260131000001_add_worker_role.sql

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+-- Migration: Add Worker Role
+-- Description: Adds worker_role field to distinguish between action workers and sensor workers
+-- Version: 20260131000001
+
+-- ============================================================================
+-- WORKER ROLE ENUM
+-- ============================================================================
+
+DO $$ BEGIN
+    CREATE TYPE worker_role_enum AS ENUM ('action', 'sensor', 'hybrid');
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
+
+COMMENT ON TYPE worker_role_enum IS 'Worker role type: action (executes actions), sensor (monitors triggers), or hybrid (both)';
+
+-- ============================================================================
+-- ADD WORKER ROLE COLUMN
+-- ============================================================================
+
+ALTER TABLE worker
+    ADD COLUMN IF NOT EXISTS worker_role worker_role_enum NOT NULL DEFAULT 'action';
+
+-- Create index for efficient role-based queries
+CREATE INDEX IF NOT EXISTS idx_worker_role ON worker(worker_role);
+CREATE INDEX IF NOT EXISTS idx_worker_role_status ON worker(worker_role, status);
+
+-- Comments
+COMMENT ON COLUMN worker.worker_role IS 'Worker role: action (executes actions), sensor (monitors for triggers), or hybrid (both capabilities)';
+
+-- Update existing workers to be action workers (backward compatibility)
+UPDATE worker SET worker_role = 'action' WHERE worker_role IS NULL;