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- #269: Update outdated TODO comments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/spawner/docker-sandbox.service.spec.ts

@@ -63,11 +63,7 @@ describe("DockerSandboxService", () => {
       const taskId = "task-456";
       const workspacePath = "/workspace/agent-123";
 
-      const result = await service.createContainer(
-        agentId,
-        taskId,
-        workspacePath
-      );
+      const result = await service.createContainer(agentId, taskId, workspacePath);
 
       expect(result.containerId).toBe("container-123");
       expect(result.agentId).toBe(agentId);
@@ -164,9 +160,9 @@ describe("DockerSandboxService", () => {
         new Error("Docker daemon not available")
       );
 
-      await expect(
-        service.createContainer(agentId, taskId, workspacePath)
-      ).rejects.toThrow("Failed to create container for agent agent-123");
+      await expect(service.createContainer(agentId, taskId, workspacePath)).rejects.toThrow(
+        "Failed to create container for agent agent-123"
+      );
     });
   });
 
@@ -330,10 +326,7 @@ describe("DockerSandboxService", () => {
         }),
       } as unknown as ConfigService;
 
-      const disabledService = new DockerSandboxService(
-        disabledConfigService,
-        mockDocker
-      );
+      const disabledService = new DockerSandboxService(disabledConfigService, mockDocker);
 
       expect(disabledService.isEnabled()).toBe(false);
     });