[Good First Issue] Add GitHub Actions status badges to README

[kamsirichard]

Context

The README has no status badges — visitors can't quickly see if the scraper is passing, when it last ran, or how many subscribers there are.

Task

Add these badges to the top of README.md, below the project title:

1. Scrape workflow status — shows green/red for the last scrape run
2. Digest workflow status — shows green/red for the last email digest
3. Python version — already exists, keep it
4. License — already exists, keep it

How to get badge URLs

GitHub generates badge URLs automatically:

https://github.com/TechHub-Extensions/ScoutBot/actions/workflows/scoutbot.yml/badge.svg
https://github.com/TechHub-Extensions/ScoutBot/actions/workflows/digest.yml/badge.svg

Markdown:

[![Scrape](https://github.com/TechHub-Extensions/ScoutBot/actions/workflows/scoutbot.yml/badge.svg)](https://github.com/TechHub-Extensions/ScoutBot/actions/workflows/scoutbot.yml)

Good for

Complete beginners — just edit one Markdown file. Estimated time: 15 minutes.