fix: add null safety check and align package versions

[Copilot]

Addresses review feedback from the Angular 15 upgrade PR by fixing a potential runtime error and aligning dependency versions.

Changes

• request.service.ts: Add null check for pageInfo before accessing endCursor in fetchMore() to prevent runtime error if called before initial subscription completes
• package.json: Update @angular/cli from ~15.2.0 to ~15.2.11 to match devkit packages version
• package.json: Remove caret prefix from caniuse-lite version specification (1.0.30001762)

async fetchMore() {
  if (!this.pageInfo) {
    return
  }
  
  const result = await this.listQuery.fetchMore({
    variables: {
      last: 20,
      before: this.pageInfo.endCursor,
    },
  })
  // ...
}

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[TwoDCube]

@copilot the CI is failing