fix(feishu): send normal group replies top-level

[de1tydev]

Summary

Fix Feishu channel behavior for normal group quote replies and quoted rich-text media hydration.

• Send normal Feishu group quote replies as top-level group messages by default.
• Preserve reply target behavior for real Feishu topics/threads, configured thread replies, and synthetic card actions.
• Carry quoted rich-text post image/media attachments into agent context.
• Update fallback send test expectations for generated retry UUID payloads.

Verification

XDG_DATA_HOME=/tmp/openclaw-pnpm-data pnpm exec oxfmt --check --threads=1 \
  extensions/feishu/src/bot.ts \
  extensions/feishu/src/bot.test.ts \
  extensions/feishu/src/send.reply-fallback.test.ts

XDG_DATA_HOME=/tmp/openclaw-pnpm-data node scripts/run-vitest.mjs run \
  extensions/feishu/src/bot.test.ts \
  extensions/feishu/src/reply-dispatcher.test.ts \
  extensions/feishu/src/send.reply-fallback.test.ts

Result: 178/178 tests passed.

Deployment note

This commit has already been fast-forwarded into de1tydev/openclaw:main and deployed to TODE68. This PR exists to preserve review/history so the branch is not forgotten.