feat(coder): complete orchestrator advanced patterns

- Approval gate steps pause and await human resolution
- appendStepEvent wired into markStep, failRun, dispatchAgentStep
- Trigger rule unit tests (6 variants)
- New parallel-research flow with one_success trigger

apps/coder/src/services/__tests__/trigger-rules.test.ts

@@ -0,0 +1,31 @@
+import { describe, it, expect } from 'vitest';
+import { evaluateTriggerRule } from '../flow-runner-decisions.js';
+
+describe('evaluateTriggerRule', () => {
+  it('all_success requires all deps done', () => {
+    expect(evaluateTriggerRule(['a', 'b'], new Set(['a', 'b']), new Set(), new Set())).toBe(true);
+    expect(evaluateTriggerRule(['a', 'b'], new Set(['a']), new Set(), new Set())).toBe(false);
+  });
+
+  it('one_success fires on first completion', () => {
+    expect(evaluateTriggerRule(['a', 'b'], new Set(['a']), new Set(), new Set(), 'one_success')).toBe(true);
+    expect(evaluateTriggerRule(['a', 'b'], new Set(), new Set(), new Set(), 'one_success')).toBe(false);
+  });
+
+  it('all_done includes skipped deps', () => {
+    expect(evaluateTriggerRule(['a', 'b'], new Set(['a']), new Set(['b']), new Set(), 'all_done')).toBe(true);
+  });
+
+  it('all_success treats excluded deps as satisfied', () => {
+    expect(evaluateTriggerRule(['a', 'b'], new Set(['a']), new Set(), new Set(['b']))).toBe(true);
+  });
+
+  it('defaults to all_success', () => {
+    expect(evaluateTriggerRule(['a'], new Set(['a']), new Set(), new Set())).toBe(true);
+    expect(evaluateTriggerRule(['a'], new Set(), new Set(), new Set())).toBe(false);
+  });
+
+  it('returns true for empty deps', () => {
+    expect(evaluateTriggerRule([], new Set(), new Set(), new Set())).toBe(true);
+  });
+});