Add Scheduled Reports and More Enrichers

New playbooks:

• add_alert_lines_to_grafana playbook

New alert enrichers:

• TemplateEnricher
• LogEnricher

New type of playbook:

• Scheduled reports: these get kicked off by an event like a new deployment and then fire every X minutes afterwards

Bug fixes:

• fix bug with deployment babysitter diffs on creation/deletion events

Other improvements:

• improve formatting of the docs