feat: rules engine — json-rules-engine integration with worklist scoring

- Self-contained NestJS module: types, storage (Redis+JSON), fact providers, action handlers
- PriorityConfig CRUD (slider values for task weights, campaign weights, source weights)
- Score action handler with SLA multiplier + campaign multiplier formula
- Worklist consumer: scores and ranks items before returning
- Hospital starter template (7 rules)
- REST API: /api/rules/* (CRUD, priority-config, evaluate, templates)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/rules-engine/actions/escalate.action.ts

@@ -0,0 +1,12 @@
+// src/rules-engine/actions/escalate.action.ts
+
+import type { ActionHandler, ActionResult } from '../types/action.types';
+import type { RuleAction } from '../types/rule.types';
+
+export class EscalateActionHandler implements ActionHandler {
+    type = 'escalate';
+
+    async execute(_action: RuleAction, _context: Record<string, any>): Promise<ActionResult> {
+        return { success: true, data: { stub: true, action: 'escalate' } };
+    }
+}