feat(llm): add LLM call support to worker IPC chain

- ProviderManager: align API with contracts ProviderAdapter
- WorkerProtocol: add llm.request/llm.response message types
- WorkerRuntime: add call_llm() for worker→parent→LLM flow
- WorkerManager: support tool_registry and provider_manager injection

P1-1 complete, P1-2 protocol layer complete.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/runtime/src/workers/WorkerManager.ts

@@ -13,6 +13,8 @@ import type { ChildProcess } from 'child_process'
 import { WorkerProcess, type WorkerExitCode } from './WorkerProcess.js'
 import { WorkerProtocol, type WorkerMessage, type WorkerMessageType } from './WorkerProtocol.js'
 import type { WorkerResult, WorkerStatus, AgentType } from '@aircoding/contracts'
+import type { ToolRegistry } from '../tools/ToolRegistry.js'
+import type { ProviderManager } from '@aircoding/llm'
 
 export interface WorkerConfig {
   entrypoint: string       // Path to worker main.ts
@@ -36,9 +38,36 @@ export interface WorkerHandle {
 export class WorkerManager {
   private protocol: WorkerProtocol
   private workers: Map<string, WorkerHandle> = new Map()
+  private tool_registry?: ToolRegistry
+  private provider_manager?: ProviderManager
+  private execution_context?: { session_id: string; project_id: string; project_root: string }
 
-  constructor() {
+  constructor(tool_registry?: ToolRegistry, provider_manager?: ProviderManager) {
     this.protocol = new WorkerProtocol()
+    this.tool_registry = tool_registry
+    this.provider_manager = provider_manager
+  }
+
+  /**
+   * Set execution context (session_id, project_id, project_root).
+   * Required for tool/LLM calls from workers.
+   */
+  set_context(ctx: { session_id: string; project_id: string; project_root: string }): void {
+    this.execution_context = ctx
+  }
+
+  /**
+   * Set tool registry (can be injected after construction).
+   */
+  set_tool_registry(registry: ToolRegistry): void {
+    this.tool_registry = registry
+  }
+
+  /**
+   * Set provider manager (can be injected after construction).
+   */
+  set_provider_manager(pm: ProviderManager): void {
+    this.provider_manager = pm
   }
 
   /**