FIX: legacy rest_id not always available

[derjogi]

When I start with an empty database, twitter fetches and updates tweets from my timeline. At that point I frequently run into this error:

[2025-06-09 23:02:26] ERROR: Failed to create Twitter client for 38d2cfad-0ec5-0515-9d2c-5f13759f09f8:
    message: "(TypeError) Cannot read properties of undefined (reading 'id_str')"
    stack: [
      "TypeError: Cannot read properties of undefined (reading 'id_str')",
      "at _ClientBase.parseTweet ([...]/node_modules/@elizaos/plugin-twitter/dist/index.js:8044:47)",
      "at _ClientBase.parseTweet ([...]/node_modules/@elizaos/plugin-twitter/dist/index.js:8033:80)",
      "at [...]/node_modules/@elizaos/plugin-twitter/dist/index.js:8218:125",
      "at Array.map (<anonymous>)",
      "at _ClientBase.fetchHomeTimeline ([...]/node_modules/@elizaos/plugin-twitter/dist/index.js:8218:105)",
      "at process.processTicksAndRejections (node:internal/process/task_queues:105:5)",
      "at async _ClientBase.populateTimeline ([...]/node_modules/@elizaos/plugin-twitter/dist/index.js:8323:22)",
      "at async _ClientBase.init ([...]/node_modules/@elizaos/plugin-twitter/dist/index.js:8202:5)",
      "at async _TwitterService.createClient ([...]/node_modules/@elizaos/plugin-twitter/dist/index.js:13793:7)",
      "at async _TwitterService.start ([...]/node_modules/@elizaos/plugin-twitter/dist/index.js:13923:9)",
      "at async [...]/node_modules/@elizaos/cli/node_modules/@elizaos/core/dist/chunk-Y4TJIR4A.js:9230:33",
      "at async [...]/node_modules/@elizaos/cli/node_modules/@elizaos/core/dist/chunk-Y4TJIR4A.js:8474:9",
      "at async startAgent ([...]/node_modules/@elizaos/cli/dist/chunk-IYVGVCIB.js:89523:3)",
      "at async [...]/node_modules/@elizaos/cli/dist/chunk-IYVGVCIB.js:89682:29",
      "at async Promise.allSettled (index 6)",
      "at async startAgents ([...]/node_modules/@elizaos/cli/dist/chunk-IYVGVCIB.js:89679:25)",
      "at async _Command.<anonymous> ([...]/node_modules/@elizaos/cli/dist/chunk-IYVGVCIB.js:89821:5)",
      "at async _Command.parseAsync ([...]/node_modules/@elizaos/cli/dist/chunk-5J7S2CSH.js:1721:9)",
      "at async main ([...]/node_modules/@elizaos/cli/dist/index.js:112:3)"

This small pr fixes that issue