update(podman)

notify: fix tg markdown

chore: 更改默认端口避免冲突

feat: 优化通知渠道配置和飞书 Markdown 兼容性

docs: reorganize container deployment section in README

fix: update Go version to 1.22 to match go.mod requirement

doc: update .env.example

chore: use podman as first-class container runtime

Fix form parsing for multipart/form-data in handleMessageNotify

Fix handleMessageNotify to return JSON for all responses

Fix email link escaping issue

Fix parseContent to include full content, not just first paragraph

Add notification formatting with sky blue email theme, Feishu card, Telegram markdown

Add notification retry, manual send, and SSE logs

feat: 改进内容提取器