JavaScript track: exercise 07's OrchestrationClient constructor missing resourceGroup

Summary

07-solve-the-crime.md instructs learners to write an OrchestrationClient constructor missing the resourceGroup argument:

​typescript constructor(model: string = process.env.MODEL_NAME!) { this.orchestrationClient = new OrchestrationClient({ promptTemplating: { model: { name: model, params: { temperature: 0.7, max_tokens: 2000 } } }, }); this.graph = this.buildGraph(); } ​

Unlike every other OrchestrationClient in this track (groundingClient/webSearchClient in tools.ts, both of which correctly pass { resourceGroup: process.env.RESOURCE_GROUP } as the second constructor argument), this one omits it entirely. Same bug exists in project/JavaScript/solution/src/investigationWorkflow.ts.

Effect

Any tenant not using AI Core's default resource group (which the exercises themselves warn against — see 05-add-the-grounding-service.md: "DO NOT USE THE DEFAULT default RESOURCE GROUP!") gets:
​ Error: No deployment matched the given criteria: {"scenarioId":"orchestration"}. Make sure the deployment is successful... ​
thrown from both intelligenceResearcherNode (the report-synthesis call after the sonar-pro searches) and leadDetectiveNode, since both use this.orchestrationClient.

Suggested fix

​```diff
this.orchestrationClient = new OrchestrationClient({
promptTemplating: { model: { name: model, params: { temperature: 0.7, max_tokens: 2000 } } },

• });

• }, { resourceGroup: process.env.RESOURCE_GROUP });
  ​```
  in both exercises/JavaScript/07-solve-the-crime.md and `project/JavaScript/solution/src/investigationWorkflow.ts`.

Environment

Reproduced on a personal SAP AI Core tenant (not the shared CodeJam subaccount), JavaScript/TypeScript track, exercises 01–07 followed in order.

So sánh constructor của OrchestrationClient trong exercises/JavaScript/07-solve-the-crime.md và project/JavaScript/solution/src/investigationWorkflow.ts với các constructor đang hoạt động trong tools.ts của track. Xác nhận rằng cả hai constructor đều truyền process.env.RESOURCE_GROUP làm đối số thứ hai, và đảm bảo exercise và solution thể hiện cùng một hành vi đã được sửa.