Sync serverless lockfile with axios proxy dependencies

[Copilot]

Backend CI started failing at npm ci because serverless/package-lock.json no longer matched the backend dependency graph. The lockfile was missing the nested axios entries for https-proxy-agent@5.0.1 and agent-base@6.0.2, so installs aborted before tests could run.

• Lockfile alignment

  • Updated serverless/package-lock.json to include the nested axios dependency entries required by the current serverless/package.json resolution.
  • This restores a consistent install graph for npm ci in the backend workflow.

• Dependency graph correction

  • Added the missing lockfile records for:
    • node_modules/axios/node_modules/https-proxy-agent
    • node_modules/axios/node_modules/agent-base

• Resulting lockfile shape

  "node_modules/axios/node_modules/https-proxy-agent": {
    "version": "5.0.1",
    "dependencies": {
      "agent-base": "6",
      "debug": "4"
    }
  }