fix(orchestrator): resolve all M6 remediation issues (#260-#269)

Addresses all 10 quality remediation issues for the orchestrator module:

TypeScript & Type Safety:
- #260: Fix TypeScript compilation errors in tests
- #261: Replace explicit 'any' types with proper typed mocks

Error Handling & Reliability:
- #262: Fix silent cleanup failures - return structured results
- #263: Fix silent Valkey event parsing failures with proper error handling
- #266: Improve error context in Docker operations
- #267: Fix secret scanner false negatives on file read errors
- #268: Fix worktree cleanup error swallowing

Testing & Quality:
- #264: Add queue integration tests (coverage 15% → 85%)
- #265: Fix Prettier formatting violations
- #269: Update outdated TODO comments

All tests passing (406/406), TypeScript compiles cleanly, ESLint clean.

Fixes #260, Fixes #261, Fixes #262, Fixes #263, Fixes #264
Fixes #265, Fixes #266, Fixes #267, Fixes #268, Fixes #269

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/orchestrator/src/api/agents/agents.module.ts

@@ -0,0 +1,11 @@
+import { Module } from "@nestjs/common";
+import { AgentsController } from "./agents.controller";
+import { QueueModule } from "../../queue/queue.module";
+import { SpawnerModule } from "../../spawner/spawner.module";
+import { KillswitchModule } from "../../killswitch/killswitch.module";
+
+@Module({
+  imports: [QueueModule, SpawnerModule, KillswitchModule],
+  controllers: [AgentsController],
+})
+export class AgentsModule {}